Abstract The coronavirus disease 2019 (COVID-19) pandemic has stimulated tremendous
efforts to develop therapeutic strategies that target severe acute respiratory syndrome …

Over 2 years have passed since the start of the COVID-19 pandemic, which has claimed
millions of lives. Unlike the early days of the pandemic, when management decisions were …

Intestinal bacteria may influence lung homeostasis via the gut-lung axis. We conducted a
single-center, quadruple-blinded, randomized trial in adult symptomatic Coronavirus …

Background Previous studies have assessed the prevalence and characteristics of self-
medication in COVID-19. However, no systematic review has summarized their findings …

Background and aim The COVID-19 pandemic has severely affected the world's population
in the last two years. Along with non-pharmacological public health interventions, major …

Abstract oxidative stress is caused by an abundant generation of reactive oxygen species,
associated to a diminished capacity of the endogenous systems of the organism to …

Updates This is the second version (first update) of the living systematic review, replacing
the previous version (available as a data supplement). When citing this paper please …

Vitamin C is an essential nutrient that serves as antioxidant and plays a major role as co-
factor and modulator of various pathways of the immune system. Its therapeutic effect during …

Background Randomized trials have shown that vitamin C shortens the duration of common
colds. Some trials reported greater effects on severe cold symptoms compared with mild …

COVID-19 is a zoonotic disease with devastating economic and public health impacts
globally. Being a novel disease, current research is focused on a clearer understanding of …