Pfizer/BioNTech Combo Vaccine Shows Partial Flu Efficacy

Setback Could Benefit Moderna

The companies said their combination mRNA vaccine showed protection against SARS-CoV-2 and influenza A, but not influenza B.

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Pfizer Inc. and BioNTech SE hit a snag in their effort to develop the combination messenger RNA (mRNA) vaccine BNT162b2+BNT161 for influenza and SARS-CoV-2 as their Phase III trial only partially met its influenza endpoint. The setback leaves the space wide open for rival Moderna, which announced positive data from the Phase III study of its candidate two months ago.

Pfizer and BioNTech said 16 August that the trial, in more than 8,000 adults aged 18-64, showed noninferiority to comparator...

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