CDC recommends older adults get 2nd updated coronavirus shot

COVID-19 vaccination: a guide to a second dose for young people 2nd dose vaccine The first dose of Pfizer-BioNTech COVID-19 Vaccine is administered three weeks after receipt of the previous dose and the second dose is 2nd dose vaccine Why do some COVID-19 vaccines require two doses? The first dose helps your body recognize the virus and start an immune system response,

vaccination 2nd dose The Centers for Disease Control and Prevention recommended Wednesday that people 65 and older get a second dose of a coronavirus vaccine