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The FDA says “two different mRNA vaccines have now shown remarkable effectiveness of about 95% in preventing covid-19 infection in adults.” 

 “Suggesting changes to the FDA-authorized dosing or schedules of these vaccines is premature and not rooted solidly in the available evidence.”

”Available data continue to support the use of two specified doses of each authorized vaccine at specified intervals.”

For Pfizer-biotech vaccine, the interval is 21 days between 1st & 2nd dose; for Moderna covid-19 vaccine, the interval is 28 days between 1st & 2nd dose.

“What we have seen is that the data in the firms’ submissions regarding the first dose is commonly being misinterpreted.”

Until vaccine makers have data supporting change, we continue to strongly recommend health care providers follow FDA authorised dosing schedule.”

Market implications

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