Currently, the US Centers for Disease Control and Prevention (CDC), which regulates vaccines in the country, does not recommend the AZ jab for use in the US.
However, Fauci told BBC Radio 4’s Today programme on Tuesday (21 September) that the country has a "substantial amount" of information on the vaccine.
"I don’t believe there’s any reason to believe that people who have received the AZ vaccine should feel there’s going to be a problem," he said..