STUDY: Six Months After Second Dose Pfizer Vaccine Is 90% Effective In Preventing Hospitalization And Death

The Washington Post reports:

The Pfizer-BioNTech coronavirus vaccine continues to be 90 percent effective in protecting against hospitalization and death from covid-19 up to six months after the second dose, even in the face of the widespread delta variant, a major study has found.

The study was based on research from Pfizer and the Kaiser Permanente Southern California health system and analyzed more than 3.4 million people who were members between December 2020 and August 2021. The findings, published in the Lancet medical journal on Monday, had been released in August but were not peer-reviewed until this week.

The study also showed that the vaccine’s effectiveness at preventing a coronavirus infection dropped over time, from 88 percent to 47 percent six months after the second dose. This is “probably primarily due to waning immunity with time rather than the delta variant escaping vaccine protection,” the study found.

Read the full article.