Biden Admin: ‘Wake Up Call’ After Mayo Clinic Study Shows Pfizer Vax Dropped to 42% Effective

Biden Admin: ‘Wake Up Call’ After Mayo Clinic Study Shows Pfizer Vax Dropped to 42% Effective


The Biden administration admits that a new study conducted by the Mayo Clinic on vaccine efficacy is a “wake up call.” The study found that the Pfizer vaccine was only 42 percent effective against infection in July.

A senior Biden official told Axios, “If that’s not a wake up call, I don’t know what is.” The “new preprint study” raises concerns about the mRNA vaccines’ effectiveness against Delta – particularly Pfizer’s.

The study compared the effectiveness of the Pfizer and Moderna vaccines from January to July. “Overall, the study found that the Moderna vaccine was 86 percent effective against infection and Pfizer’s was 76 percent; Pfizer’s was 85 percent effective against hospitalization, while Moderna’s was 92 percent” reports Human Events.

However, “the vaccines’ effectiveness against infection dropped sharply in July to 76 percent with Moderna and 42 percent with Pfizer.”

Human Events reports:

This was the case in states like Minnesota and Florida. 

 “Based on the data that we have so far, it is a combination of both [a reduction in effectiveness over time and a reduced effectiveness against Delta],” said Venky Soundararajan, a lead author in the study. “The Moderna vaccine is likely – very likely – more effective than the Pfizer vaccine in areas where Delta is the dominant strain, and the Pfizer vaccine appears to have a lower durability of effectiveness.” 

In a statement, Pfizer said it “expect[s] to be able to develop and produce a tailor-made vaccine against that variant in approximately 100 days after a decision to do so, subject to regulatory approval.” 


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