Background Novel coronavirus disease 2019 (COVID-19) has become a pandemic, and
over 80 million cases and over 1.8 million deaths were reported in 2020. This highly …

Background: Immune response to SARS-CoV-2 is crucial for preventing reinfection or
reducing disease severity. T-cells' long-term protection, elicited either by COVID-19 vaccines …

Background What leads healthy people to enter in a volunteer register for clinical trials? This
study aimed to investigate the relationship between the decision to volunteer in clinical trials …

Background: The impressively rapid availability of different types of COVID-19 vaccines and,
on the other hand, the degree of their effectiveness as opposed to the likelihood of serious …

As COVID-19 vaccinations became available in early 2021, we collected data from a US
national sample of 496 people living with HIV (PLWH) to assess COVID-19 vaccination …

Background The global concern regarding protection against the COVID-19 variants through
pre-existing antibodies from vaccination or previous infection is evident. Reports from …

Objectives Immunocompromised patients were excluded from COVID-19 vaccine clinical
trials. The objectives of the study were to measure antibody responses, levels, and …

Background Public support of public health measures including physical distancing,
masking, staying home while sick, avoiding crowded indoor spaces and contact …

Background Research concerned with attitudes towards COVID-19 vaccination in upper
middle-income countries such as Bosnia and Herzegovina (B&H) is scarce. Currently, B&H …

COVID-19 vaccinations protect against severe illness and death, but associations with post-
COVID conditions (PCC) are less clear. We aimed to evaluate the association between prior …