If You've Never Had COVID, Should You Relax or Worry? - WebMD

Experts warn against the feeling that if you have not had it, you are unlikely to get it. Genetic factors are emerging that may help predict who may be at highest risk for infection and severe disease.

[MUSIC PLAYING] SPEAKER: How does a COVID-19 mRNA vaccine work? COVID vaccines are now available. Some of the COVID-19 vaccines are mRNA vaccines, but what does this mean? mRNA vaccines are … [+2094 chars]

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