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FACT BRIEF

Are COVID-19 boosters weakening the immune system?

By Ed Payne
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NO

At a press briefing by the European Medicines Agency on Jan. 11, 2022, the vaccine strategy chief, Marco Cavaleri, made some misunderstood comments on why repeated boosters against COVID-19 are not a long-term strategy:

"If we have a strategy in which we give boosters, let's say every four months approximately, we will end up, potentially, having problems with the immune response and the immune response may end up not being as good as we would like it to be."

The European Medicines Agency says that what he said was, "Repeated administration of boosters might lead to the immune response to the vaccine being lower, which means the vaccines could become less effective."

See a full discussion of this at Lead Stories
This fact brief is responsive to conversations such as this one.
Sources
European Medicines Agency EMA press briefing, Jan. 11, 2022 (via YouTube)
ABOUT THE CONTRIBUTOR
Lead Stories
Lead Stories is a fact checking and debunking website at the intersection of big data and journalism that launched in 2015. It scouts for trending stories, images, videos and posts that contain false information in order to fact check them as quickly as possible. It actively monitors the fake-news ecosystem and doesn’t wait for reader tips or reports before getting started on a story.
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About fact briefs published on Gigafact
Fact briefs are short, credibly sourced summaries that offer “yes/no” answers in response to claims found online. They rely on publicly available, often primary source data and documents. Fact briefs are created by contributors to Gigafact —a nonprofit project looking to expand participation in fact-checking and protect the democratic process. See all fact briefs here.