Breakthrough COVID-19 Archives - Page 2 of 2

U.S. data show rising ‘breakthrough’ infections among fully vaccinated

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Some 25 percent of SARS-CoV-2 infections among Los Angeles County residents occurred in fully vaccinated residents from May through July 25, a period that includes the impact of the highly transmissible Delta variant, U.S. officials reported on Aug. 24.

August 24, 2021/by Andrew Humphreys

Moderna may be superior to Pfizer against Delta; breakthrough odds rise with time

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The mRNA vaccine from Pfizer and BioNTech may be less effective than Moderna’s against the Delta variant of the coronavirus, according to two reports posted on medRxiv on Aug. 8 ahead of peer review.

August 10, 2021/by Andrew Humphreys