CDC Changes covid-19 Vaccine Guidance to OK Mixing Vaccine Shots

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  • The US Centers for Disease Control and Prevention (CDC) has quietly changed its guidance on COVID-19 vaccine shots, giving a nudge to health workers to mix Pfizer's and Moderna's shots in "exceptional situations"
  • While Pfizer's and Moderna's vaccines were authorized to be given 21 and 28 days apart respectively, the agency now says you can receive either shot as long as they are taken at least 28 days apart
  • The agency updated its guidelines on Thursday, stating that both vaccines are not interchangeable but that in rare situations where supplies are limited or the patient cannot recall which vaccine they took, either of them may be administered
  • The agency, however, acknowledged that it wasn't certain whether its new recommendations would change the effectiveness or safety of either vaccine
  • However, vaccine research experts have said that both vaccines are so similar structurally that people shouldn't be worried if both vaccines are mixed in rare circumstances