Moderna vs. Pfizer: , Which COVID-19 Vaccine, Offers the Longest Protection?.<br />After the coronavirus vaccines were granted emergency authorization, federal health officials said the different shots were all equally effective.<br />After the coronavirus vaccines were granted emergency authorization, federal health officials said the different shots were all equally effective.<br />According to 'The New York Times,' recent studies suggest that may not be the case over time. .<br />In the United States, roughly 221 million doses of the Pfizer-BioNTech vaccine have been administered.<br />compared to about 150 million doses <br />of Moderna’s vaccine.<br />In six studies published in recent weeks, Moderna’s vaccine appeared to be more effective over the <br />long term than the Pfizer-BioNTech vaccine.<br />Research published by the CDC found that the efficacy <br />of the Pfizer-BioNTech vaccine fell from 91% to 77% <br />after a four-month period following the second shot.<br />Research published by the CDC found that the efficacy <br />of the Pfizer-BioNTech vaccine fell from 91% to 77% <br />after a four-month period following the second shot.<br />Over the same period of time, the Moderna <br />vaccine showed no decline in<br />its protection against hospitalization.<br />The 'NYT' reports that if the efficacy gap <br />continues to widen, it may have implications <br />for the debate on booster shots.<br />Federal agencies are currently considering <br />recommending a third shot of the Pfizer-BioNTech <br />vaccine for some high-risk groups.<br />Scientists, initially skeptical of the reported <br />differences, have slowly accepted <br />there exists a small, but real, disparity.<br />Scientists, initially skeptical of the reported <br />differences, have slowly accepted <br />there exists a small, but real, disparity.<br />The 'NYT' also points out that the data indicating that effects vary are based mostly on observations...<br />... since the vaccines have never been directly <br />compared in a carefully designed study
