Co-infection of influenza virus and SARS-CoV-2 can lead to more severe disease than infection of either alone.
Dr. Céline Gounder, an internist, epidemiologist and infectious disease specialist, is a CBS News medical contributor as well as senior fellow and editor-at-large for public health at KFF Health News.
Vaccines have traditionally worked by teaching the immune system to recognize a specific virus or bacterium—in effect, ...
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