Effects of Vitamin C Supplements on Clinical Outcomes and Hospitalization Duration for Patients with Coronavirus Disease 2019 (COVID-19): A Systematic Review and Meta-Analysis.

Context: Vitamin C has been used as an essential antioxidant to reduce the inflammatory response associated with pneumonia and acute respiratory distress syndrome in patients with the 2019 coronavirus disease (COVID-19), but its effect on clinical outcomes remains controversial and inconclusive.

Objective: The purpose of this study was to conduct a meta-analysis and systematic review to assess the effects of vitamin C supplementation on the severity of COVID-19 in hospitalized patients.

Data Sources: Web of Science, Embase, Cochrane Library, PubMed, CNKI, CSTJ, Wan fang, and CBM databases were searched for publications between January 2020 and December 2023 that met the inclusion criteria.

A systematic review and meta-analysis of the effectiveness and safety of COVID-19 vaccination in older adults.

Unlabelled: In the coronavirus disease 2019 (COVID-19) pandemic, vaccinations were essential in preventing COVID-19 infections and related mortality in older adults. The objectives of this study were to evaluate the effectiveness and safety of the COVID-19 vaccines in older adults. We systematically searched the electronic bibliographic databases of PubMed, Web of Science, Embase, Cochrane Library, ClinicalTrials.