Soma Mandal, MD, is a board-certified internal medicine physician with a specialty in women’s health. You are likely not contagious with COVID-19 nine days after your symptoms start. Continue ...
R 0, pronounced “R naught” or “R zero,” is a mathematical term that indicates how contagious an infectious disease is. It’s also referred to as the reproduction number. R 0 of 1 means an infection in ...
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