Three-times higher chance of catching COVID-19 six months after jab

Embargoed until: Publicly released: 2021-12-21 06:45

International

In a massive US study, people who were vaccinated at least six months prior were 3.4 times more likely to catch COVID-19 than people jabbed more recently; this trend was found across ages and vaccines. While death rates were low for all vaccinated groups, mortality rates increased for older adults who got the Pfizer jab in earlier months. This study found the Moderna vaccine’s protection was sustained in regard to deaths. The authors say their work adds to the evidence for booster shots, especially for older adults who’ve had the Pfizer vaccine.

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Research Massachusetts Medical Society, Web page

Journal/
conference: NEJM Evidence

Research:Paper

Organisation/s: Centers for Disease Control and Prevention, Utah Department of Health, New Jersey Department of Health, New York City Department of Health and Mental Hygiene, Massachusetts Department of Public Health, Michigan Department of Health and Human Services, etc. (US)

Funder: Funded by the Centers for Disease Control and Prevention

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