Vaccine Comparison  This preprint retrospective study compares the effectiveness of the Moderna (mRNA-1273) and Pfizer/BioNTech (BNT162b2)  vaccines from January to July 2021 in the Mayo Clinic Health System.   The researchers examine effectiveness during which the highly prevalent waves of either Read More
Vaccine Effectiveness This observational study evaluates the effectiveness of BNT162b2 (Pfizer vaccine) among health care workers in an area with a high rate of the B.1.1.7 variant in Northern Italy during the time period of January 25, 2021 through April 13, Read More

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