BACKGROUND There is uncertainty about the timing of booster vaccination against COVID-
19 in highly vaccinated populations during the present endemic phase of COVID-19. Studies …

Background Updating vaccines is essential for combatting emerging coronavirus disease
2019 (COVID-19) variants. This study assessed the public health and economic impact of a …

Myocarditis is the most salient serious adverse event following messenger RNA-based
Covid-19 vaccines. The highest risk is observed after the second dose compared to the first …

Residents in nursing homes face heightened COVID-19 risks. We aimed to assess the
adverse events (AEs) rates and antibody responses after the first to the fifth dose of COVID …

Background COVID-19 booster vaccinations mitigate transmission and reduce the morbidity
and mortality associated with infection. However, the optimal date for booster administration …

Clarifying and differentiating the causes of diseases is an essential step in any clinical
activity, but it takes on particular relevance and complexity in the case that arise following …

Background The COVID-19 pandemic has significantly impacted people with cancer. Initial
vaccine studies excluded patients with malignancy. Immunocompromised individuals …

Adolescents are vulnerable to Coronavirus disease 2019 (COVID-19) infections; thus, their
antibodies should be maintained above the protective value. This study aimed to evaluate …

Background In several countries, COVID-19 booster vaccinations are offered annually to
priority groups, but many people have not been vaccinated in over a year. We aimed to …

Background: The COVID-19 pandemic has greatly affected nursing home residents (NHRs),
a vulnerable group with high rates of illness and death. While vaccination is essential for …