Pfizer is testing whether third shot will help tackle COVID-19 variants

The trial is simply to be prepared in case a strain becomes resistant to the vaccine.

“We take these steps to make it ensure a long-term immunity against the virus and its variants.”

“We’ve now purchased enough vaccine supply to vaccinate all Americans,“Biden said.

Actually administering the vaccines to all Americanscould take longerbecause vaccinations are managed at a state and local level.

Here’swhere to get a COVID-19 shot, and how totrack how many vaccines are availablein your state.