Pfizer used COVID-19 Vaccine Dose Far Lower Than Moderna’s to Minimise Side Effects, Scientists Say

Business Insider reported:

Pfizer’s top scientist defended the dose of the active ingredient in the company’s COVID-19 vaccine, which is lower than in Moderna’s vaccine.



Pfizer’s COVID-19 vaccine has 30 micrograms of mRNA, while Moderna’s has 100 micrograms. Scientists have speculated that this could be a reason Pfizer’s shot produced a lower antibody response than Moderna’s in recent studies.


Philip Dormitzer, Pfizer’s chief scientific officer, told the Financial Times on Wednesday that Pfizer and its codeveloper BioNTech “used the minimum dose level” to get an immune response that was stronger than catching COVID-19.

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