Free radicals are a group of damaging molecules produced during the normal metabolism of
cells in the human body. Exposure to ultraviolet radiation, cigarette smoking, and other …

Since its emergence in Wuhan, China, covid-19 has spread and had a profound effect on
the lives and health of people around the globe. As of 4 July 2021, more than 183 million …

The COVID-19 pandemic is one of the greatest threats to human health in the 21st century
with more than 257 million cases and over 5.17 million deaths reported worldwide (as of …

We investigated the frequency of brain fog in a large cohort of patients with documented
coronavirus disease‐2019 (COVID‐19) who have survived the illness. We also scrutinized …

SARS-CoV-2 infects cells via its spike protein binding to its surface receptor on target cells
and results in acute symptoms involving especially the lungs known as COVID-19. However …

Most COVID-19 patients recovered with low mortality; however, some patients experienced
long-term symptoms described as “long-COVID” or “Post-COVID syndrome”(PCS). Patients …

Worldwide, over 694 million people have been infected with SARS-CoV-2, with an estimated
55–60% of those infected developing COVID-19. Since the beginning of the pandemic in …

Objectives Hyper-inflammation caused by COVID-19 may be mediated by mast cell
activation (MCA) which has also been hypothesized to cause Long-COVID (LC) symptoms …

Post-COVID cognitive dysfunction (PCCD) is a condition in which patients with a history of
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, usually three …

Scope The aim of these guidelines is to provide evidence-based recommendations for the
assessment and management of individuals with persistent symptoms after acute COVID-19 …