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Pfizer Vaccine Protection Wanes After 6 Months: Study
Pfizer's COVID-19 vaccine continues to show strong protection against serious illness and hospitalization after 6 months, but overall protection against the virus appears to wane after a half a year, according to a new study.
The July 28 preprint report of the study, which has not been peer reviewed, suggests a gradual "declining trend in vaccine efficacy" over 6 months after a two-dose regimen of the Pfizer vaccine. The study included more than 45,000 people worldwide.
The study found that overall effectiveness fell from 96% to 84%.
The July 28 preprint report of the study, which has not been peer reviewed, suggests a gradual "declining trend in vaccine efficacy" over 6 months after a two-dose regimen of the Pfizer vaccine. The study included more than 45,000 people worldwide.
The study found that overall effectiveness fell from 96% to 84%.
A third booster dose of the Pfizer vaccine increases neutralizing antibody levels against the Delta variant by more than five times compared to levels after a second dose in people aged 18 to 55 years, new data from Pfizer show.
The immune response to the third dose appears even more robust ― more than 11 times higher than the response to second shot ― among people aged 65 to 85 years.
The immune response to the third dose appears even more robust ― more than 11 times higher than the response to second shot ― among people aged 65 to 85 years.
Kyle
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