Timing of Second COVID-19 Vaccine Dose Doesn't Matter, But Get it Fast, Experts Say

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  • The Centers for Disease Control and Prevention (CDC), national pharmacy chains, and public health experts have advised that people who have received the first coronavirus vaccine dose may not need to wait 21-28 days before getting the second shot
  • The CDC said in an update on its website Thursday that the second dose of the coronavirus vaccine should be administered as close to the recommended interval as possible, but may be scheduled up to 42 days after the first dose if the former is not feasible
  • The Food and Drug Administration says the second doses of the Pfizer-BioNTech and Moderna vaccines are to be administered 21 days and 28 days respectively after the first doses
  • These dose intervals are based on how the vaccines were administered during clinical trials
  • Dr. Buddy Creech, director of the Vanderbilt Vaccine Research Program at Vanderbilt University Medical Center, Nashville, Tennessee says even if one delays the second dose by up to eight weeks, it won't negatively impact on the immune system