Background Residents of nursing homes are one of the most vulnerable groups during the
severe acute syndrome coronavirus 2 (SARS-CoV-2) pandemic. The aim of this study was to …

Elderly residents of long-term care facilities (LTCFs) have long been underrepresented in
studies on vaccine efficacy, particularly in light of currently emerging variants of concern …

In this prospective observational cohort study we analyzed cellular and serological immune
response parameters against SARS-CoV-2 and current variants of concern (VOC) in 147 …

Introduction In Hungary, the HUN-VE 3 study determined the comparative effectiveness of
various primary and booster vaccination strategies during the Delta COVID-19 wave. That …

SARS-CoV-2 vaccines have shown very high effectiveness in real-world scenarios.
However, there is compelling evidence for a fast-paced waning of immunity. The increasing …

The emergence of new SARS-CoV-2 variants, such as the more transmissible Delta and
Omicron variants, has raised concerns on efficacy of the COVID-19 vaccines. Here, we …

Background SARS-CoV-2 vaccination is the most effective strategy to protect older residents
of long-term care facilities (LTCF) against severe COVID-19, but primary vaccine responses …

Long-term care facility (LTCF) older residents display physiological alterations of cellular
and humoral immunity that affect vaccine responses. Preliminary reports suggested a low …

The elderly residing in long-term care facilities (LTCFs) are a group at high risk for COVID-
19. Hence, monitoring of the vaccine-based immunity has a pivotal role in identifying …

Background The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic
has led to the development of various vaccines. Real-life data on immune responses elicited …