On January 12, 2021 The US government reversed course and is now releasing its entire cache of COVID-19 vaccines to states — including doses previously reserved for second shots, Health and Human Services (HHS) czar Alex Azar, reasoned this to be because they “now believe that our manufacturing is predictable”.
The two vaccines currently authorised, Pfizer & Moderna, require a second doses, 21-28 days following the first dose. “The Trump administration had been holding back millions of doses to ensure that those who received the first shot would get their second.”
States are now encouraged “to immediately open up immunizations to everyone age 65 and older.”