vaccination
Inoculation with weakened or dead microorganisms to develop immunity and prevent disease caused by the regular strain of that microorganism.
Last Updated
October 7, 2025
October 7, 2025
Last updated: October 7, 2025.
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COVID-19 antiviral treatment
COVID-19 continues to spread easily, causing millions of illnesses each year in the United States. While COVID-19 vaccines provide the best defense against the virus, a new medication can also help...