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Ten states, mostly in the northeast, have now reached President Joe Biden s goal to vaccinate at least 70% of adults with at least one dose by July 4, said the Centers for Disease Control and Prevention Wednesday.
And multiple studies are indicating that immunity may persist for months or even years.
A majority of people infected by COVID-19 still have antibodies against the virus 10 months later, according to a study published Monday. Two other studies published Monday studied people who had been exposed to the virus a year ago and found that cells retain a memory of the coronavirus that only strengthens over time (though the result may not be derived from vaccines alone).