Dr. Siegel on potential COVID vaccine effectiveness: Unlike annual flu, virus is not ‘a moving target’


Fox News medical contributor Dr. Marc Siegel said Monday that the common flu, unlike coronavirus, is a “moving target” that often changes form from year to year, while COVID-19 is more static.

Siegel reacted on “Bill Hemmer Reports” to comments from Pfizer CEO Albert Bourla, who said there is a “good chance” he will know by late October if the company’s potential vaccine will be effective.

“In our best case we have quite a good chance — more than 60% — but we will know if the product works or not by the end of October,” Bourla said in a recent interview. “It doesn’t mean that it works, It means that we will know if it works.”

In that regard, Siegel said Bourla told the Food and Drug Administration that 44,000 people will be part of a vaccine test — meaning 22,000 get the vaccine and 22,000 do not.

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