Beyond the verbal: Pregnant women's preferences for receiving influenza and Tdap vaccine information from their obstetric care providers

A Qualitative, Patient-led Exploration of Vaccination Communication Preferences Among a Diverse Sample of Pregnant, Postpartum, Breastfeeding Canadians

BACKGROUND

Vaccination during pregnancy is recommended to protect pregnant individuals and their fetus from vaccine-preventable diseases and to protect infants during the vulnerable postnatal period. However, vaccine uptake in pregnancy remains low. This study explores how pregnant, postpartum and breastfeeding individuals living in Canada prefer to communicate about vaccination during pregnancy.

METHODS

We used peer-to-peer, patient-oriented research to conduct an exploratory qualitative descriptive study using focus groups and semistructured in-depth interviews to enquire about vaccination in pregnancy communication preferences, including preferred provider and communication timing. We coded deductively using direct content analysis and inductively while remaining sensitive to themes arising during the interviews.

RESULTS

Fourteen individuals from diverse cultural backgrounds living in Canada who self-identified as women and either as being pregnant, recently postpartum, or breastfeeding participated. Most preferred a participatory approach to vaccine communications combined with clear guidance. A trusted relationship with their provider mattered more than the healthcare provider's profession. Participants wanted to discuss vaccines early and often to allow them time to find answers and discuss with their partners before making decisions. Participants also shared the importance of mutual respect, maintaining their autonomy and not feeling forced or coerced.

CONCLUSIONS

Pregnant individuals want to play an active role in decision-making regarding vaccination during pregnancy. Their preference is to have open communication with familiar, trusted providers where they can express their questions and receive a clear recommendation which takes into consideration their unique circumstances so they can evaluate their options before making a decision.

Acceptance of recommended vaccinations during pregnancy: a cross-sectional study in Southern Italy

Background

Vaccine administration is a recommended, safe, and effective measure to protect pregnant women against vaccine-preventable diseases (VPDs). Despite available guidance, maternal immunization rates for vaccination against influenza and with the reduced antigen content tetanus-diphtheria-acellular pertussis vaccine (Tdap) in Italy remain incredibly low. The primary goal of the study was to explore what Italian pregnant women knew about VPDs and immunization during pregnancy and what factors affected their decision to be vaccinated.

Methods

This cross-sectional study took place between October 2021 and April 2022 in the Southern part of Italy. All consecutive pregnant women, from those attending the selected facilities on randomly selected days, were approached to request participation. The inclusion criteria for participation were age ≥18 years, the ability to understand, speak, and read Italian, and being pregnant at any gestational age. The questionnaire, using a combination of checkboxes and free text answers, consisted of 32 items divided into five parts and lasted ~10 min.

Results

The results showed that 61% knew that the influenza vaccine is recommended and 48.7% knew that influenza could be risky during pregnancy; 74.1% wrongly reported that the Measles-Mumps-Rubella (MMR) vaccine is recommended during pregnancy. Seven out of 10 pregnant women believed that strong evidence supported the safety of vaccinations during pregnancy, and more than half (55.6%) thought they were at increased risk of severe illness with COVID-19. Women in the sample believed that vaccines received during pregnancy pose a risk of adverse events to the unborn child with a median value of 6 (IQR 3-9), on a scale ranging from 1 to 10. Similarly, the fear of contracting pertussis and influenza during pregnancy showed a median value of 6 (IQR 3-9) and 5 (IQR 3-8), respectively. Only 21.1% and 36.5% of women received influenza and Tdap vaccines during pregnancy.

Conclusion

Unrealistic risk perception with a negative attitude toward vaccines in pregnancy and a low percentage of vaccinated pregnant women confirm the urgency of training women to make informed choices to increase overall vaccine uptake.

Maternal Vaccination and Vaccine Hesitancy

The American College of Obstetrics and Gynecology recommends influenza vaccine annually, Tdap with each pregnancy, and COVID-19 vaccine for those not previously vaccinated or who are due for boosters. The influenza and COVID-19 vaccines are safe during pregnancy and are effective in reducing morbidity in both the pregnant person and infant. The Tdap vaccine is given primarily to protect the newborn from pertussis through transplacental antibody transfer. Methods to enhance vaccination rates include stocking and giving vaccines in the obstetric office, recommending eligible vaccines at each visit, and focusing on the health of the infant in conversations with patients.

Obstetric Provider Attitudes and Office Practices for Maternal Influenza and Tdap Vaccination

Background: Although maternal vaccination with influenza and tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) vaccines improve health outcomes for pregnant individuals and infants, maternal vaccination rates are low. This study assessed obstetric providers' attitudes and practices related to influenza and Tdap vaccination in four large health systems in New York (NY) and California (CA). Methods: We conducted a cross-sectional survey of all obstetric providers within four health systems (two in NY, two in CA) to evaluate provider attitudes and office systems used for Tdap and influenza vaccination. The survey assessed perceptions of influenza and Tdap vaccination based on the Health Belief Model, and assessed office systems (reminders, prompts, standing orders, and patient education) and communication with pregnant patients related to influenza and Tdap vaccines. Results: We had 112 responses (52% response rate) for analyses. Respondents strongly supported vaccination during pregnancy but viewed influenza disease as less of a concern for newborns than for pregnant individuals (40% vs. 67% considered influenza disease to be very significant, p < 0.001). Only 84% agreed that giving influenza vaccine in the first trimester is very safe. Patient vaccine refusal was the most commonly named barrier for both influenza and Tdap vaccination. Providers frequently used office system prompts, but did not frequently use standing orders, patient educational materials, vaccine champions, and feedback on vaccination rates. Conclusions: While most providers consider influenza and Tdap vaccination important during pregnancy, there is room for improvement in focusing on the importance of maternal vaccination to the health of the infant, and increasing the use of office systems to improve vaccination during pregnancy.

Assessment of factors affecting attitudes and knowledge of pregnant women about COVID-19 vaccination

The aim of this study was to analyse knowledge and attitudes of pregnant women about Coronavirus disease (COVID-19) and its vaccine. Pregnant women who attended outpatient maternal care between October 2020 and March 2021 were invited to participate in this cross-sectional survey study. To identify the effect of baseline characteristics of participants on their vaccination decision, the pregnant women were divided into two groups as accepting or rejecting the COVID-19 vaccine. The Multiparity rate was significantly higher in the rejection group (73.8 vs. 42.3, p = .001). Education level and rate of employment in the professional health sector were significantly higher in the acceptance group (p = .001 and p = .008). A total of 103 (26.4%) pregnant women from the acceptance group, and 23 (10.9%) from the rejection group had a history of the death of relatives and acquaintances from COVID-19 (p = .001). The present study demonstrated that nulliparous status, higher education level, working as a professional healthcare provider and incidence of death in relatives due to COVID-19 significantly rise pregnant women's acceptance of the COVID-19 vaccine. Considering the overall acceptance rate of 65%, improved vaccination programmes using all types of information sources need to be the main task to block the COVID-19 pandemic. IMPACT STATEMENTWhat is already known on this subject? There are previous studies that evaluated the attitudes and beliefs about several vaccine types among pregnant women. An important part of tackling the COVID-19 pandemic is the success of the COVID-19 vaccination program in pregnant women. In this respect, it is important to know the attitudes of pregnant women regarding COVID-19 vaccination.What do the results of this study add? The baseline characteristics of pregnant women with or without acceptance of COVID-19 vaccination were similar regarding COVID-19 infection. The rates of being not multiparous and a health worker were higher in women with acceptance of COVID-19 vaccination. The rate of loss of relatives was also higher in women with acceptance of COVID-19 vaccination. In women without acceptance of COVID-19 vaccination, the major drawback was related to the possibility of harm to their baby's and own health.What are the implications of these findings for clinical practice and/or further research? In pregnant women, the attitude to COVID-19 vaccination may be modifiable by the design of focussed information media with respect to their education, occupation, and parity. Longitudinal studies are needed to determine whether this approach can effectively increase the rate of COVID-19 vaccination in pregnant women.

Efficacy of a Smartphone Application to Promote Maternal Influenza Vaccination: A Randomized Controlled Trial

The maternal vaccine coverage rate has been low in Taiwan. We developed an “Influenza Vaccination Reminder Application” and evaluated its efficacy in improving vaccination intention among pregnant women in Taiwan. A randomized controlled trial was conducted to compare the positive change in vaccination intention between the experimental group and the control group. Pregnant women who were more than 20 years old and at less than 32 weeks of gestation were recruited from four regional hospitals in southern Taiwan during November 2020 to April 2021. Pregnant women were randomly assigned to the experimental group, to whom the “Influenza Vaccination Reminder Application” was provided for at least two months, while pregnant women in the control group received regular maternal education only. The differences in knowledge about influenza and its vaccines, attitudes towards maternal influenza vaccination, and behavior intention of influenza vaccination among pregnant women before and after the experiment intervention were compared between two groups. The results included 126 women in the experimental group and 117 women in the control group and showed that the “Influenza Vaccination Reminder Application” increased pregnant women’s knowledge about influenza and vaccines (percentage increase in the experimental group and control group: 11.64% vs. 7.39%), strengthened their positive attitudes towards maternal influenza vaccination (percentage increase: 5.39% vs. 1.44%), and promoted positive behavioral intention toward influenza vaccination (proportion of participants with positive change in vaccination intention: 17.46% vs. 7.69%). The study supports use of “Influenza Vaccination Reminder Application” to promote the behavior intention of influenza vaccination among pregnant women in Taiwan.

Vaccination in pregnancy against pertussis and seasonal influenza: key learnings and components from high-performing vaccine programmes in three countries: the United Kingdom, the United States and Spain

BACKGROUND

Pertussis and seasonal influenza are responsible for significant maternal, neonatal, and infant morbidity and mortality, but vaccine coverage rates (VCR) for both pertussis (administered as a tetanus, diphtheria, acellular pertussis [Tdap] vaccination) and seasonal influenza in pregnancy remain generally low. Only a small number of countries, including Spain, the United Kingdom (UK), and the United States (US), have high Tdap and seasonal influenza VCRs in pregnancy. The purpose of this study was to identify the key factors that contributed to the high VCRs observed in these countries.

METHODS

The experience from both Tdap and seasonal influenza vaccination programmes during pregnancy were documented in Spain, the UK, and the US using a three-step approach. A literature review yielded 157 publications, and a further 117 documents were selected through desk research. A published five-pillar VCR framework for influenza was amended to evaluate the specific contributing factors leading to high Tdap and seasonal influenza VCRs among pregnant women.

RESULTS

The analysis identified components that contributed to higher VCR in pregnant women across three different healthcare systems in Spain, UK, and US. The combination of several key interventions in each country led to a rapid increase in VCR that reached near-optimal levels (i.e. 75% for seasonal influenza) within a few years. As well as inclusion in national immunisation programme and vaccine reimbursement, key components that were identified included the mobilisation of health authorities, prenatal care Healthcare Professionals (HCP) and scientific societies, the inclusion of vaccination in antenatal medical guidance, the provision of educational material to HCPs, and a strong disease awareness driven by recent pertussis outbreaks in each country.

CONCLUSIONS

Although there is no simple, universal solution to improving sub-optimal VCRs, the list of components identified in this study from three countries with high-performing Tdap and seasonal influenza vaccination programmes provides a basis for public health and medical stakeholders in other countries to define strategies to successfully implement national vaccination programmes for pregnant women.

Reliability of information available on popular websites about vaccination of pregnant women

OBJECTIVE

To analyze the reliability of information available on popular websites about vaccination of pregnant women according to the recommendations of the Brazilian Ministry of Health.

METHOD

Descriptive and comparative study. For data collection, a checklist composed of information on recommended, contraindicated, and indicated vaccines in special situations during pregnancy, according to the Ministry of Health, was elaborated.

RESULTS

None of the analyzed websites presented all the recommended information. Contraindications, most common adverse events, simultaneous administration of vaccines, information on the DT vaccine, and recommended vaccines in special situations were presented by a minority of websites.

CONCLUSION

Information available on websites about the vaccination of pregnant women is not always based on the recommendations and misinformation may interfere with the acceptance of this practice. The importance of the professionals of the multidisciplinary team as information mediators, particularly the nurse, is emphasized, as is the need for regulating the production and dissemination of information on the internet.

Acceptance of Pertussis Vaccination among Pregnant Women in Taiwan

This cross-sectional study assessed prenatal pertussis vaccination acceptance in Taiwan. A sample of pregnant women from five private clinics in Taiwan was recruited. Demographics, experience of prenatal vaccinations, key considerations, knowledge, and attitude about pertussis and its vaccination were measured. Among 505 participants, the vaccination rate, including planned vaccination, was 29.7%. Factors associated with acceptance included clinic location, primary caregiver of the newborn, newborns with siblings, previous influenza vaccination history, knowledge and attitude toward pertussis and its vaccination. Public health agencies should provide free vaccinations, clarify misinformation, and publicize prevention information, to improve prenatal pertussis vaccination acceptance.

Understanding factors that influence the decision to be vaccinated against influenza and pertussis in pregnancy: A qualitative study

AIMS AND OBJECTIVES

To identify how pregnant women perceive pertussis and influenza and the factors that influence their decision to be vaccinated.

BACKGROUND

Suffering from influenza during pregnancy increases complications in the pregnant woman, foetus and newborn. Pertussis in children under six months of age causes severe complications. Maternal vaccination against influenza and pertussis is effective and safe. However, vaccination rates are insufficient.

DESIGN

We conducted a qualitative descriptive study, using semi-structured interviews. This research adheres to the COREQ guidelines and checklist.

METHODS

We carried out 18 semi-structured face-to-face interviews with pregnant women, using intentional sampling and thematic analysis.

RESULTS

We identified an overarching theme, 'factors that influenced participants' decision to be vaccinated or not', which was composed of four subthemes that were in turn made up of 12 categories. The factors that influenced participants' decision to be vaccinated against influenza and pertussis were related to their knowledge of and their perception of risk for these diseases. Participants perceived the risk of pertussis to be greater, and they focused their concern on the newborn. The recommendations and convictions of nurse-midwives were the most important factors encouraging vaccination. Participants trusted their nurse-midwives and most reported that they would have been vaccinated if their midwife had recommended it. Other factors were linked to lack of information, fear and concerns about economic interests.

CONCLUSIONS

The convictions and actions of the nurse-midwife in recommending vaccination to pregnant women are decisive. Strategies to improve vaccination rates should be directed to helping health professionals understand how their practice affects the final decision of pregnant women.

RELEVANCE TO CLINICAL PRACTICE

Understanding the factors that limit vaccination rates among pregnant women provides valuable information to nurse-midwives that can help to improve vaccination strategies and practices. Increased maternal vaccination rates would reduce morbidity and mortality among pregnant women and newborns.

Vaccination in pregnancy: Challenges and evidence-based solutions

Vaccination in pregnancy (VIP) is dually beneficial - it protects the mother and the baby from tetanus, influenza, and pertussis. VIP uptake is low in many countries. Vaccine hesitancy, defined by the World Health Organization (WHO) as a "delay in acceptance or refusal of vaccination despite the availability of vaccination services" is one of WHO's ten threats to global health per 2019. According to extensive research, mostly from high-income countries (HIC) and limited to tetanus, influenza and pertussis vaccines, lack of provider recommendations, safety concerns, and limitations in access are the main barriers to VIP. Health care provider recommendation is the leading facilitator for VIP across various socioeconomic status groups. Data on strategies to overcome patient, provider, and system barriers to VIP are inconsistent, contradictory, or lacking. Patient-focused research on evidence-based strategies to overcome provider and system barriers is needed. Furthermore, VIP programs require embedded continuous quality improvement to ensure sustainability.

Knowledge and attitudes towards maternal immunization: perspectives from pregnant and non-pregnant mothers, their partners, mothers, healthcare providers, community and leaders in a selected urban setting in South Africa

BACKGROUND

Maternal immunization has prevented millions of child deaths globally; nevertheless, incomplete vaccination remains a public health concern in South Africa, where almost half of child deaths occur during neonatal period. This study explored the knowledge and attitudes inhibiting vaccine acceptancy during pregnancy.

METHODS

Key informant and semi-structured interviews were conducted with pregnant women receiving antenatal care at community clinics, antenatal care staff, women enrolled in maternal immunization trials, community leaders and non-pregnant women residing in Soweto. Focus Group Discussions were also held with the mothers and husbands/partners of the pregnant women (n = 55).

RESULTS

The study established good knowledge, a positive attitude and high acceptability of maternal immunization among pregnant women, non-pregnant women, antenatal staff as well as church and community leaders. Men were the least positive about maternal immunization. Aside from antenatal staff, there was poor knowledge regarding the types of vaccinations administered and the health benefits of immunization across all the study groups. Reasons adduced for poor knowledge about the types of vaccinations include lack of communication on maternal immunization during antenatal sessions or clinic visits and power dynamics that tend to exist between healthcare workers and patients.

CONCLUSION

Ensuring that healthcare workers provide useful information on immunization during antenatal visits as well as include men in education sessions regarding the benefit of vaccination may increase patients' confidence and immunization uptake.

"Paper, face-to-face and on my mobile please": A survey of women's preferred methods of receiving antenatal education

BACKGROUND

Antenatal education prepares women for childbirth and can be delivered face-to-face, in hard-copy and electronically. Smartphones allow access to online learning and internet searching is common among pregnant women. It is unclear which mode of health information delivery women prefer.

AIM

This study aimed to investigate how women at one Local Health District (LHD) preferred to receive health information during pregnancy and the early postnatal period.

METHODS

We developed a survey to gather data on women's preferences for educational information. Women who were discharged from one LHD, in NSW Australia, were invited, in 2019, to participate in a simple 14 question survey, either online or in hard copy format.

FINDINGS

In total, 685 women completed the survey which represented a 40% response rate over a period of two months. The survey revealed women commonly used smart phones, or other devices, to source information. Despite this, most women preferred to receive antenatal education via non-electronic methods. Of note many participants felt underprepared for the post-birth period. The method of survey completion, whether hardcopy or online, aligned with individuals' preferences for information delivery.

CONCLUSION

Non-electronic methods of education delivery were the preferred method for most women, and this was consistent across all educational, cultural and socioeconomic levels. Women sought information online, or through apps, but these options did not always meet their knowledge needs, especially regarding the postnatal period. We recommend that hospitals continue to provide information in a variety of modes, as exclusively electronic methods may marginalise groups of women.

Adapting Center for Disease Control and Prevention's immunization quality improvement program to improve maternal vaccination uptake in obstetrics

INTRODUCTION

Maternal vaccination is critical for improving maternal and child health. Quality Improvement (QI) models¹, such as the Centers for Disease Control and Prevention's (CDC) Assessment, Feedback, Incentives, eXchange (AFIX)² model, have not yet been adapted to maternal vaccinations. This study assesses the impact of AFIX-OB, an adapted version of AFIX for obstetric settings, on maternal vaccination rates.

METHODS

Between December 2016 and May 2018, state health departments and obstetric practices in Colorado and Georgia implemented the adapted AFIX-OB model. The model addressed unique patterns in patient encounters, practice flow, health records systems and competing clinical priorities in the obstetric setting through a menu of clearly-defined QI strategies, bi-weekly technical assistance meetings with designated immunization champions, incentives for champions/staff, and adapted tools to aid each practice during implementation. Vaccination rates were assessed by random chart reviews pre- and post-intervention.

RESULTS

The AFIX-OB model was evaluated in eleven obstetric practices in two states as part of a multi-level intervention to increase maternal vaccination. Post AFIX-OB implementation, documented influenza vaccination rates increased from 56% at baseline to 65% (p < 0.01); and tetanus, diphtheria, and acellular pertussis (Tdap) vaccination rates increased from 77% at baseline to 84% (p < 0.02) across all practices.

CONCLUSIONS

The AFIX-OB model showed improvement in maternal vaccination rates for both influenza and Tdap vaccines. AFIX-OB may provide a useful framework for obstetric practices, as well as for other health care specialties. The focused goal should be on broader dissemination among those interested in adopting an evidence-based model for increasing vaccine uptake.

Gaps in maternal influenza vaccine uptake in Northern Territory: A need for a year-round influenza vaccination campaign

INTRODUCTION

Maternal influenza vaccination was introduced in 2010 due to the high morbidity and mortality associated with influenza in pregnancy. The aim of this study was to assess the maternal influenza vaccination uptake in Northern Territory public hospitals and identify gaps to improve uptake.

METHODS

Birth data from Northern Territory (NT) public hospitals obtained from the Perinatal Register for deliveries in 2016 were merged with vaccination records from the NT immunisation register.

RESULTS

There were 3,392 viable pregnancies in NT public hospitals in 2016 with 45.6% vaccination coverage against influenza. There was a statistically significant difference in coverage with 68.5% in Indigenous vs 31.7% in non-Indigenous deliveries (p < 0.001), yielding an odds ratio of 4.67 (95% CI 4.02, 5.42) for maternal influenza vaccination across Indigenous status. Influenza vaccination coverage for preterm births (< 37 weeks) was low especially in non-Indigenous mothers at 27.2% vs 65.05% in Indigenous mothers (p < 0.001). A distinct immunisation administration pattern was noted for 2016 with 58.9% of vaccinations occurring between April and June regardless of Indigenous status and maternal gestational age. This correlated with the annual influenza immunisation campaign by the NT and Commonwealth.

CONCLUSION

A year-round maternal influenza vaccination campaign is crucial to avoid missed opportunities and increase vaccination protection for mother and baby. Antenatal influenza vaccination campaign with health care workers education and increasing patient awareness should continue throughout the year.

Do HCWs adequately know about meningitis and 4CMenB vaccine and recommend its use to parents? A cross sectional analysis in Campania Region, Italy

Invasive meningococcal disease (IMD) is a severe disease caused by various Neisseria meningitidis serogroups that represents a serious public health problem worldwide. In Italy, serogroups B and C are the major causes of IMD. On 14 January 2013, the European Medicines Agency authorized the use of the first vaccine available to protect against meningococcal serogroup B (4CMenB). The aim of this study was to assess the IMD epidemiology knowledge and 4CMenB vaccine attitudes of healthcare workers (HCWs) with regard to recommending this vaccine for use, vaccine practices and infectious disease control in the Campania region in Italy. A cross-sectional study was conducted among 293 HCWs (49.5% physicians and 46.4% nurses)interviewed using a self-administered questionnaire. The majority of the HCWs had sufficient knowledge about the disease incidence and lethality, but they were less informed about the higher risk age categories and the serogroups most frequently involved. Additionally, their knowledge about the vaccine was poor with regard to the targeted categories and side effects. Approximately30.0% of the HCWs reported incidences of fever and pain and swelling at the injection site. Moreover,32.8% of the HCWs knew that the risk of developing adverse reactions increases when the 4CMenB vaccine is co-administered with other vaccines. Overall, all of the HCWs were convinced that vaccinations are an important instrument for preventing infectious diseases, and they were aware of their central role in promoting the 4CmenB vaccination and their need to be better informed.

Key considerations for successful implementation of maternal immunization programs in low and middle income countries

The Maternal Neonatal Tetanus Elimination program is proof of concept for the feasibility and potential for maternal immunization to reduce neonatal mortality particularly in low and middle-income countries. Introduction of any additional vaccine into the antenatal space, such as Influenza and Pertussis, and potentially Respiratory Syncytial Virus and Group B Streptococcus vaccines in the future, requires strengthening of antenatal care and immunization services. Successful implementation also requires robust disease surveillance in pregnant women and neonates and active surveillance for adverse events following immunization to monitor the impact and ensure the safe use of the vaccine. This review outlines five key elements essential for successful implementation of a maternal immunization program focusing particularly on low and middle-income countries. These include; relevant considerations in supporting a decision to undertake a maternal immunization program including knowledge of local disease epidemiology, involvement of the consumer, healthcare provider recommendation, equitable access to maternal vaccination, and systems for disease surveillance, program evaluation and safety monitoring.

Understanding barriers and predictors of maternal immunization: Identifying gaps through an exploratory literature review

BACKGROUND

The Advisory Committee for Immunization Practices recommends that all pregnant women receive the seasonal influenza vaccine and the tetanus toxoid, diphtheria toxoid, and acellular pertussis (Tdap) vaccine during every pregnancy. However, vaccination coverage rates are suboptimal among pregnant women in the United States, leaving these women and their unborn children at risk of vaccine-preventable diseases and their complications.

OBJECTIVES

We sought to understand the current landscape of published literature regarding maternal immunization, including barriers to and predictors of vaccine acceptance, and identify gaps in the research in order to inform strategies for future programmatic improvement.

METHODS

We conducted a literature search using MEDLINE (OVID), PsychINFO, and CINAHL (Ebsco) databases. The search included published, English-language manuscripts that identified patient, provider, or system-level barriers to, predictors of, or interventions that improved uptake of maternal vaccines among pregnant women in the US. Studies were reviewed using an inductive thematic analysis approach.

RESULTS

We included 75 studies in our review. Pregnant women identified 25 different barriers to accepting recommended maternal immunizations; barriers related to vaccine safety perceptions were the most common. Healthcare providers identified 24 different barriers to vaccinating their pregnant patients. The most commonly cited barriers among healthcare providers were financial concerns. Eighteen different predictors of vaccine acceptance were identified. Receipt of a healthcare provider's recommendation was the factor most frequently reported as a reason for vaccination among pregnant women.

CONCLUSIONS

We were able to identify gaps in the literature regarding maternal immunization and make recommendations for future research. Efforts to address the challenges of maternal immunization in the United States should include increasing the focus on Tdap, implementing more high-level assessments of safety perceptions and associated concerns, and determining most effective interventions.