Introduction The COVID-19 epidemic and various control and mitigation measures to combat
the widespread outbreak of the disease may affect other parts of health care systems. There …

Abstract Background and Aims Older people have higher rates of comorbidities and may
experience more severe inflammatory responses; therefore, are at higher risk of death …

Introduction Patients with immunodeficiency are usually more prone to worse outcomes of
infectious diseases. However, there are some disagreements in the context of COVID-19, for …

Background Pregnant women form a specially vulnerable group due to unique changes in
pregnancy, leading to a higher risk of getting a severe infection. As severe COVID-19 …

Introduction: Earlier studies demonstrated a decreased level of physical activity (PA) during
the COVID-19 pandemic. Therefore, we aimed to systematically review the relevant studies …

Background and aims A healthy diet play an important role in the prevention and even
treatment of various diseases. Proper nutrition plays an important role in boosting of immune …

Introduction: Controversies existed regarding the duration of COVID-19 vaccines' protection
and whether receiving the usual vaccine doses would be sufficient for long-term immunity …

Introduction COVID-19 can result in an extensive range of extrapulmonary, and neurological
signs and symptoms such as olfactory and/or taste dysfunction, and otologic symptoms. The …

Background The safety of continuing total joint arthroplasty (TJA), as an elective procedure,
during the pandemic is controversial. The present study aimed to investigate the incidence …

Introduction: The accurate number of COVID-19 cases is essential knowledge to control an
epidemic. Currently, one of the most important obstacles in estimating the exact number of …