Background: Asymptomatic or symptomatic infection with severe acute respiratory syndrome
coronavirus 2 (SARS-CoV-2) can be followed by reinfection. The protection conferred by …

Objective We aimed to look at the burden of disease caused by SARS-COV-2 reinfections
and identified potential risk factors for disease severity. Methods We used national …

Methods This descriptive cross-sectional study was approved by the Khyber Medical
University (KMU) Ethical Committee. Due to retrospective nature of our analysis, we were …

Despite over 140 million SARS‐CoV‐2 infections worldwide since the beginning of the
pandemic, relatively few confirmed cases of SARS‐CoV‐2 reinfection have been reported …

Background It is currently unclear whether SARS-CoV-2 re-infection will remain a rare event,
only occurring in individuals who fail to mount an effective immune response, or whether it …

Reports of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reinfection have
raised important questions about the strength and durability of the immune response to …

By the beginning of November 2020, almost 50 million cases of coronavirus disease 2019
(COVID-19) had been reported worldwide, with over 35 million people defined as recovering …

Background Protection afforded from prior disease among patients with coronavirus disease
2019 (COVID-19) infection is unknown. If infection provides substantial long-lasting …

Background The duration of immunity in SARS-CoV-2 infected people remains unclear.
Neutralizing antibody responses are the best available correlate of protection against re …

Background Positive results from real-time reverse-transcription polymerase chain reaction
(rRT-PCR) in recovered patients raise concern that patients who recover from coronavirus …