COVID-19 is currently considered a systemic infection involving multiple systems and
causing chronic complications. Compared to other post-viral fatigue syndromes, these …

Objectives This study aimed to describe the impact of vaccination and the role of humoral
responses on post–COVID-19 syndrome 1 year after the onset of SARS coronavirus type 2 …

Recent studies showed that a low 25-hydroxyvitamin D (25 (OH) D) level was associated
with a higher risk of morbidity and severe course of COVID-19. Our study aimed to evaluate …

Background: COVID-19 vaccines induce a differentiated humoral and cellular response, and
one of the comparable parameters of the vaccine response is the determination of IgG …

Acknowledging the neurological symptoms of COVID‐19 and the long‐lasting neurological
damage even after the epidemic ends are common, necessitating ongoing vigilance. Initial …

(1) Background: Vitamin K (VK) is a fat-soluble compound with a common chemical
structure, a 2-methyl-1, 4-naphthoquinone ring, and a variable aliphatic side-chain. VK is …

Purpose To investigate the robustness and longevity of SARS-CoV-2 immune responses
conferred by natural infection and vaccination among priority populations such as …

We sought to determine the prevalence of antiphospholipid antibodies (aPLs) and their
correlation with COVID-19 severity (in terms of clinical and laboratory parameters) in …

Background Understanding the dynamics of SARS-CoV-2 reinfections is crucial for public
health policy, vaccine development, and long-term disease management. However, data on …

Several important sex and gender differences in the clinical manifestation of diseases have
been known for a long time but are still underestimated. The infectious Coronavirus 2019 …