https://thehill.com/policy/healthcar...ter-six-months
Study shows Pfizer COVID-19 vaccine effectiveness declines after six months
A study published on Monday in The Lancet medical journal found that the efficacy of the Pfizer-BioNTech COVID-19 vaccine fell below 50 percent after about six months after the second dose.
The Pfizer-funded study found that Pfizer's vaccine was 88 percent effective in the first month after full vaccination but dropped to 47 percent effectiveness at about six months. The vaccine was also found to be highly effective against the delta variant, which was found to be over 90 percent effective in the first months before dropping to 53 percent effectiveness after four months.
Researchers determined that the waning immunity had to do with the amount of time since an individual was given the second shot rather than due to the highly infectious delta strain.
Study shows Pfizer COVID-19 vaccine effectiveness declines after six months
A study published on Monday in The Lancet medical journal found that the efficacy of the Pfizer-BioNTech COVID-19 vaccine fell below 50 percent after about six months after the second dose.
The Pfizer-funded study found that Pfizer's vaccine was 88 percent effective in the first month after full vaccination but dropped to 47 percent effectiveness at about six months. The vaccine was also found to be highly effective against the delta variant, which was found to be over 90 percent effective in the first months before dropping to 53 percent effectiveness after four months.
Researchers determined that the waning immunity had to do with the amount of time since an individual was given the second shot rather than due to the highly infectious delta strain.
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