Background There is evidence that the adaptive or acquired immune system is one of the
crucial variables in differentiating the course of coronavirus disease 2019 (COVID-19) …

Background As the COVID-19 pandemic rages on, reports on disparities in vaccine roll out
alongside COVID-19 reinfection have been emerging. We conducted a systematic review to …

Objectives Simple and standardized methods to establish correlates to vaccine-elicited
SARS-CoV-2 protection are needed. Methods An observational study on antibody response …

Background There is currently no consensus on the diagnosis, definition, symptoms, or
duration of COVID-19 illness. The diagnostic complexity of Long COVID is compounded in …

Since the emergence of the novel coronavirus SARS-CoV-2 in late 2019, the COVID-19
pandemic has hindered social life and global economic activity. As of July 2021, SARS-CoV …

Results: In an observational study, we studied 23 patients (92% female; median age
40years) reporting new neuropathic symptoms beginning within 1 month after SARS-CoV-2 …

Research on post-vaccination antibody dynamics has become pivotal in estimating COVID-
19 vaccine efficacy. We studied anti-SARS-CoV-2 Spike RBD IgG levels in 587 healthcare …

Background One year after the declaration of the coronavirus disease 2019 (COVID-19)
pandemic by the World Health Organization (WHO) and despite the implementation of …

Background Limited data are available on the attitudes of caregivers toward COVID-19
vaccination in children and adolescents with a history of SARS-CoV-2 infection or Long …

When the first vaccines against SARS-CoV-2 emerged, pregnant women were excluded
from clinical trials, so vaccine recommendations were initially adjourned, with late initiation …