Joe Biden was against the COVID-19 vaccine when his political enemy was pushing for its development. He poo-pooed it on several occasions, goading the American people to NOT get the vaccine, challenging them with "Who's going to take the shot? Are you going to be the first one to say 'sign me up?'" He changed his mind immediately after being elected president.
You should never trust anything a politician says.
Trump....Biden...any of them will say things with
a singular goal in mind, ie, getting elected.
Epidemiologists, virologists, & immunologists
are more reliable sources of info.
If you want to know what you should do, just ask
me. I'll check with Mrs Revolt, who studied
epidemiology at Johns Hopkins, & has worked in
health care analytics for almost half a century.
Trust me.
Obeying her is the path to happiness.