Pfizer Confirms High Efficacy and Safety 6 Months Following Second Vaccine

April 1, 2021

Today, Pfizer released a statement confirming their vaccine has exhibited “high efficacy and no serious safety concerns through up to six months following [the] second dose.” 

The Pfizer vaccine has demonstrated a 91.3% efficacy rate against COVID-19 from seven days through up to six months after delivery of the second dose. The vaccine was 100% effective against severe COVID-19. The vaccine also demonstrated 100% efficacy against the B1.351 variant. This data provides “the first clinical results that a vaccine can effectively protect against currently circulating variants.” 
“Vaccine safety has now been evaluated in more than 44,000 participants aged 16 years and older with more than 12,000 vaccinated participants having at least six months of follow-up after their second dose.” Over the six-month period, no serious safety concerns were observed after receiving the second dose.

It should be noted that “immunocompromised persons, including individuals receiving immunosuppressant therapy, may have a diminished immune response to the Pfizer-BioNTech COVID-19 Vaccine,” according to the U.S. FDA Emergency Use Authorization Prescribing Information. Data on Pfizer’s COVID-19 Vaccine administered to immunocompromised patients and people with autoimmune disease are incomplete and are insufficient in informing risks for this population group. That being said, the FDA has said that those living with autoimmune disease may receive the COVID-19 vaccine. Patients should speak with their doctors regarding their healthcare plan before receiving the vaccine.





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