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FDA Confirms Pfizer Vaccine 95% Effective, Warns Of ‘Severe Adverse Reactions’ After Dose 2

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FDA Confirms Pfizer Vaccine 95% Effective, Warns Of ‘Severe Adverse Reactions’ After Dose 2

Tyler Durden

Tue, 12/08/2020 – 08:07

Pfizer and partner BioNTech’s COVID-19 vaccine meets expectations on agency guidance and is enough to spur an agency review, according to staff of the U.S. Food and Drug Administration.

The finding is one of several significant new results featured in the briefing materials, which span 53 pages of data analyses from the agency and from Pfizer.

On the bright side, the study sponsors “provided adequate information to ensure the vaccine’s quality and consistency for authorization of the product under an EUA” agency reviewers said in briefing documents ahead of a Thursday panel.

Additionally, the study confirms that the vaccine worked well regardless of a volunteer’s race, weight or age.

However, one thing of note in the ‘risk’ section includes:

The vaccine has been shown to elicit increased local and systemic adverse reactions as compared to those in the placebo arm, usually lasting a few days…

Severe adverse reactions occurred in 0.0-4.6% of participants, were more frequent after Dose 2 than after Dose 1 and were generally less frequent in older adults (>55 years of age) (lymphadenopathy occurred much more frequently in the vaccine group than the placebo group and is plausibly related to vaccination.   

The experimental vaccine, BNT162b2, is on track to be the first shot to get an emergency authorization in the U.S.

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Full Briefing Document below:


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