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Drs. Kwon and Babcock reveal vaccine effectiveness in health care professionals in a publication in NEJM

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Estimated Adjusted Effectiveness of mRNA Vaccines against Covid-19 among Health Care Personnel According to Follow-up Time after Receipt of the Second Dose. To evaluate evidence of waning of vaccine effect, we estimated effectiveness every 2 weeks during the 14 total weeks of follow-up available immediately after receipt of the second dose (Figure 1). The point estimate of vaccine effectiveness, assessed in 2-week intervals, was highest during weeks 3 and 4 after receipt of the second dose (96.3%; 95% CI, 92.5 to 98.2). The point estimates were lower during weeks 9 through 14, but the 95% confidence intervals were wide and overlapping.
Estimated Adjusted Effectiveness of mRNA Vaccines against Covid-19 among Health Care Personnel According to Follow-up Time after Receipt of the Second Dose. To evaluate evidence of waning of vaccine effect, we estimated effectiveness every 2 weeks during the 14 total weeks of follow-up available immediately after receipt of the second dose (Figure 1). The point estimate of vaccine effectiveness, assessed in 2-week intervals, was highest during weeks 3 and 4 after receipt of the second dose (96.3%; 95% CI, 92.5 to 98.2). The point estimates were lower during weeks 9 through 14, but the 95% confidence intervals were wide and overlapping.

Hilary Babcock, MD, MPH, professor of medicine and Jennie Kwon, DO, MSCI, assistant professor of medicine participated in a CDC led multicenter study, published in the New England Journal of Medicine, showing that the Pfizer and Moderna COVID vaccines were highly effective under real-world conditions in preventing symptomatic COVID19 in health care personnel.

Drs. Kwon and Babcock wish to thank all of the health care professionals and research teams who made this work possible!

You may access the entire article, Effectiveness of mRNA Covid-19 Vaccine among U.S. Health Care Personnel.