How long does immunity last after COVID vaccination, and do we need booster shots?
An important factor in achieving herd immunity against SARS-CoV-2 (the virus that causes COVID-19) is is how long the vaccines protect you.
source https://medicalxpress.com/news/2021-08-immunity-covid-vaccination-booster-shots.html
source https://medicalxpress.com/news/2021-08-immunity-covid-vaccination-booster-shots.html
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