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Old vaccines for COVID-19: Tetanus, diphtheria show promise
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Old vaccines for COVID-19: Tetanus, diphtheria show promise

A history of diphtheria and tetanus vaccination may partly explain why some people with COVID-19 do not require hospitalization. David Greedy/Getty Images Tetanus and diphtheria vaccines may produce protective effects against COVID-19. Preliminary data finds severe disease outcomes significantly reduced among people who have received vaccines. Scientists say that the vaccines could be achieving this...