The Centers for Disease Control and Prevention moved Thursday to formally loosen its COVID-19 vaccination requirement on foreign visitors, which will now allow some to board flights into the U.S. with only a single dose of a COVID-19 vaccine from Pfizer or Moderna. "Because some traveler ...
Since that story appeared, the CDC announced, in their beneficence, that the shotmandatewill expire on 11 May, as scheduled. The fellow writing the article worried, though, that “authorities have previously chosen to renew these policies just ahead of previous expiration dates.” Authorities? No...
This expiration date is not relevant to how long vaccinated people are protected against Covid-19. (That remains unclear.) Instead, the expiration date is primarily helpful for governments and vaccine providers, who have to coordinate buying and using large amounts of vaccine within the limited ...