Senior author Dan H. Barouch, MD, PhD, Director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center. Credit: Beth Israel Deaconess Medical Center

Companion study suggests COVID-19 infection protects against re-exposure.

With nearly 5 million confirmed cases globally and more than 300,000 deaths from COVID-19, much remains unknown about <span data-cmtooltip="Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the official name of the virus strain that causes coronavirus disease (COVID-19). Previous to this name being adopted, it was commonly referred to as the 2019

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