Monitoring HIV-indicator condition guided HIV testing in Estonia

OBJECTIVES

The aim of the study was to assess indicator condition (IC) guided HIV testing in Estonia from 2012-2015.

METHODS

We used Estonian Health Insurance Fund (EHIF) data. EHIF is the core purchaser of health care services in Estonia, covering health care costs for insured people (94% of the total population). After health care services' provision, the provider sends an invoice to EHIF, which includes patient information (e.g. age, gender, diagnoses based on ICD-10) and services provided (e.g. what tests were performed).

RESULTS

Among the ICs analysed, the highest proportion of patients tested was among those presenting with infectious mononucleosis-like illness (27-33% of patients) and viral hepatitis (28-32%), the lowest proportion of patients tested was among those presenting with herpes zoster (4-5%) and pneumonia (4-8%). Women were tested somewhat less than men, especially in cases of sexually transmitted infections (9-13% and 18-21%, respectively).

CONCLUSIONS

Our data shows that IC-guided HIV testing rates are low in Estonia. Therefore, it is critical to follow Estonian HIV testing guidelines, which recommend IC-guided testing. In general, health insurance data can be used to monitor IC-guided HIV testing.

Invited article: Electric solar wind sail: toward test missions

The electric solar wind sail (E-sail) is a space propulsion concept that uses the natural solar wind dynamic pressure for producing spacecraft thrust. In its baseline form, the E-sail consists of a number of long, thin, conducting, and centrifugally stretched tethers, which are kept in a high positive potential by an onboard electron gun. The concept gains its efficiency from the fact that the effective sail area, i.e., the potential structure of the tethers, can be millions of times larger than the physical area of the thin tethers wires, which offsets the fact that the dynamic pressure of the solar wind is very weak. Indeed, according to the most recent published estimates, an E-sail of 1 N thrust and 100 kg mass could be built in the rather near future, providing a revolutionary level of propulsive performance (specific acceleration) for travel in the solar system. Here we give a review of the ongoing technical development work of the E-sail, covering tether construction, overall mechanical design alternatives, guidance and navigation strategies, and dynamical and orbital simulations.