Johnson & Johnson’s COVID vaccine less effective against Delta variant, study says

The Johnson & Johnson vaccine. Photo: New York National Guard
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Johnson & Johnson’s single-shot COVID-19 vaccine is less effective against coronavirus variants than the original virus, according to a study posted online Tuesday.

The study, published by bioRxiv but not yet peer reviewed, indicated the vaccine’s effectiveness in neutralizing the Delta and Lambda variants was “significantly decreased.”

However, studies published by Johnson & Johnson earlier this month suggest that its vaccine protects against the Delta strain. It “generated strong, persistent activity against the rapidly spreading Delta variant,” spokeswoman Seema Kumar told The New York Time…

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