Home Covid- Comparing Moderna v. Pfizer Covid-19 Vaccines:

Comparing Moderna v. Pfizer Covid-19 Vaccines:

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The statements, views and opinions expressed in this column are solely those of the author and do not necessarily represent those of this site. This site does not give financial, investment or medical advice.

Eric Zuesse

The first study was published by medRxiv “The Preprint Server for Health Sciences” on August 9th, and compared (on 25,589 vaccinated v. 25,589 unvaccinated Minnesotans) “the effectiveness of two full-length Spike protein-encoding mRNA vaccines from Moderna (mRNA-1273) and Pfizer/BioNTech (BNT162b2) in the Mayo Clinic Health System in Minnesota over time from January to July 2021.” Moderna was 86% effective against the infection; Pfizer was 76% effective. In July (when the “Delta” variant first became dominant) Moderna was 91.6% effective against hospitalization; Pfizer was 85%. But during that month, effectiveness against the infection was 76% for Moderna v. 42% for Pfizer. Nationwide (including Mayo in MN, WI, AZ, FL, & IA), Moderna was about twice as effective “against breakthrough infection” v. Pfizer.

The second study was far smaller, published on September 10th by the CDC, and studied only 1,175 hospitalized U.S. veterans (93% male) at V.A. centers nationwide. Moderna was estimated at 91.6% effective, Pfizer at 83.4%. Since no non-hospitalized comparison-sample were studied, “Vaccine effectiveness … to prevent Covid-19-associated hospitalization was estimated by using multivariate logistic regression to compare the odds of full vaccination between case-patients and controls,” and so the reliability of this study was far less than in the Mayo Clinic study.

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Investigative historian Eric Zuesse is the author of  They’re Not Even Close: The Democratic vs. Republican Economic Records, 1910-2010, and of  CHRIST’S VENTRILOQUISTS: The Event that Created Christianity.

The statements, views and opinions expressed in this column are solely those of the author and do not necessarily represent those of this site. This site does not give financial, investment or medical advice.

vaccinesModernacovidPfizer

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