Prospective Assessment of Humoral and Cellular Immune Responses to a Third COVID-19 mRNA Vaccine Dose Among Immunocompromised Individuals

BACKGROUND

Improved coronavirus disease 2019 (COVID-19) prevention is needed for immunocompromised individuals.

METHODS

A prospective study was performed of health care workers (HCW) and immunocompromised participants with baseline serology following 2 mRNA vaccine doses and who were retested after dose 3 (D3); multivariable regression was used to identify predictors of serological responses. IFN-γ/TNF-α T-cell responses were assessed in a subset.

RESULTS

In total, 536 participants were included: 492 immunocompromised (206 solid organ transplant [SOT], 128 autoimmune, 80 hematologic malignancy [HM], 48 solid tumor, 25 HIV), and 44 HCW. D3 significantly increased spike IgG levels among all, but SOT and HM participants had the lowest median antibody levels post-D3 (increase from 0.09 to 0.83 and 0.27 to 1.92, respectively), versus HCW and persons with HIV, autoimmune conditions, and solid tumors (increases from 4.44 to 19.79, 2.9 to 15.75, 3.82 to 16.32, and 4.1 to 25.54, respectively). Seropositivity post-D3 was lowest for SOT (49.0%) and HM (57.8%), versus others (>90%). Neutralization post-D3 was lowest among SOT and HM. Predictors of lower antibody levels included low baseline levels and shorter intervals between vaccines. T-cell responses against spike increased significantly among HCW and nonsignificantly among immunocompromised individuals.

CONCLUSIONS

D3 significantly improves serological but not T-cell responses among immunocompromised individuals. SOT and HM patients have suboptimal responses to D3.

Implementing a Discharge Follow-up Phone Call Program Reduces Readmission Rates in an Integrated Health System

ABSTRACT

In this study, we sought to determine the effect of implementing a large-scale discharge follow-up phone call program on hospital readmission rates. Previous work has shown that patients with unaddressed concerns during discharge have significantly higher rates of care complications and hospital readmissions. This study is an observational quality improvement project completed from April 17, 2020 to January 31, 2022 at 22 hospitals in a large, integrated academic health system. A nurse-led scripted discharge follow-up phone call program was implemented to contact all patients discharged from inpatient care within 72 hours of discharge. Readmission rates were tracked before and after project implementation. Over a 21-month span, 137,515 phone calls were placed, and 57.92% of patients were successfully contacted within 7 days of discharge. The 7-day readmission rate for contacted patients was 2.91% compared with 4.73% for noncontacted patients. The 30-day readmission rate for contacted patients was 11.00% compared with 12.17% for noncontacted patients. We have found that discharge follow-up phone calls targeting patients decreases risk of readmission, which improves overall patient outcomes.

Prospective Evaluation of Coronavirus Disease 2019 (COVID-19) Vaccine Responses Across a Broad Spectrum of Immunocompromising Conditions: the COVID-19 Vaccination in the Immunocompromised Study (COVICS)

BACKGROUND

We studied humoral responses after coronavirus disease 2019 (COVID-19) vaccination across varying causes of immunodeficiency.

METHODS

Prospective study of fully vaccinated immunocompromised adults (solid organ transplant [SOT], hematologic malignancy, solid cancers, autoimmune conditions, human immunodeficiency virus [HIV]) versus nonimmunocompromised healthcare workers (HCWs). The primary outcome was the proportion with a reactive test (seropositive) for immunoglobulin G to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) receptor-binding domain. Secondary outcomes were comparisons of antibody levels and their correlation with pseudovirus neutralization titers. Stepwise logistic regression was used to identify factors associated with seropositivity.

RESULTS

A total of 1271 participants enrolled: 1099 immunocompromised and 172 HCW. Compared with HCW (92.4% seropositive), seropositivity was lower among participants with SOT (30.7%), hematological malignancies (50.0%), autoimmune conditions (79.1%), solid tumors (78.7%), and HIV (79.8%) (P < .01). Factors associated with poor seropositivity included age, greater immunosuppression, time since vaccination, anti-CD20 monoclonal antibodies, and vaccination with BNT162b2 (Pfizer) or adenovirus vector vaccines versus messenger RNA (mRNA)-1273 (Moderna). mRNA-1273 was associated with higher antibody levels than BNT162b2 or adenovirus vector vaccines after adjusting for time since vaccination, age, and underlying condition. Antibody levels were strongly correlated with pseudovirus neutralization titers (Spearman r = 0.89, P < .0001), but in seropositive participants with intermediate antibody levels, neutralization titers were significantly lower in immunocompromised individuals versus HCW.

CONCLUSIONS

Antibody responses to COVID-19 vaccines were lowest among SOT and anti-CD20 monoclonal recipients, and recipients of vaccines other than mRNA-1273. Among those with intermediate antibody levels, pseudovirus neutralization titers were lower in immunocompromised patients than HCWs. Additional SARS-CoV-2 preventive approaches are needed for immunocompromised persons, which may need to be tailored to the cause of immunodeficiency.

Antibody Responses After mRNA-Based COVID-19 Vaccination in Residential Older Adults: Implications for Reopening

Objective

COVID-19 disproportionately impacts residents in long-term care facilities. Our objective was to quantify the presence and magnitude of antibody response in vaccinated, older adult residents at assisted living, personal care, and independent living communities.

Design

A cross-sectional quality improvement study was conducted March 15 – April 1, 2021 in the greater Pittsburgh region.

Setting and Population

Participants were older adult residents at assisted living, personal care, and independent living communities, who received mRNA-based COVID-19 vaccine. Conditions that impair immune responses were exclusionary criteria.

Methods

Sera were collected to measure IgG anti-SARS-CoV-2 antibody level with reflex to total anti-SARS-CoV-2 immunoglobulin levels, and blinded evaluation of SARS-CoV-2 pseudovirus neutralization titers. Descriptive statistics, Pearson correlation coefficients, and multiple linear regression analysis evaluated relationships between factors potentially associated with antibody levels. Spearman correlations were calculated between antibody levels and neutralization titers.

Results

All participants (N = 70) had received two rounds of vaccination and were found to have antibodies with wide variation in relative levels. Antibody levels trended lower in males, advanced age, current use of steroids, and longer length of time from vaccination. Pseudovirus neutralization titer levels were strongly correlated (P < .001) with Beckman Coulter antibody levels [D614 G NT50, r_s = 0.91; B.1.1.7 (UK) NT50, r_s = 0.91].

Conclusions and Implications

Higher functioning, healthier, residential older adults mounted detectable antibody responses when vaccinated with mRNA-based COVID-19 vaccines. Data suggests some degree of immunity is present during the immediate period following vaccination. However, protective effects remain to be determined in larger studies as clinical protection is afforded by ongoing adaptive immunity, which is known to be decreased in older adults. This study provides important preliminary results on level of population risk in older adult residents at assisted living, personal care, and independent living communities to inform reopening strategies, but are not likely to be translatable for residents in nursing homes.

The impact and perception of nursing certification in pediatric nursing

Nursing certification is an assessment and formal recognition of specialized knowledge, and is awarded through achievement of standards identified by a nursing specialty (Niebuhr & Biel, 2007). This recognition is a method of not only assessing competency, but knowledge and skills, and has been linked to an increase in patient satisfaction and nurse retention (Kleinpell, 2009). For these reasons, a heightened focus has been on identifying the value of nursing certification and outcomes related to patient care. This study explored nurse perception of certification and measured response to a high fidelity simulated scenario by certified and non-certified pediatric nurses to a deteriorating patient through simulation and self-assessment.