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The Johnson & Johnson coronavirus vaccine is effective against the highly contagious Delta variant, even eight months after inoculation, the company reported Thursday a finding that should reassure the 11 million Americans who have gotten the shot.
The vaccine showed a small drop in potency against the variant, compared with its effectiveness against the original virus, the company said. But the vaccine was more effective against the Delta variant than the Beta variant, first identified in South Africa the pattern also seen with mRNA vaccines.
Antibodies stimulated by the vaccine grow in strength over time, researchers also reported.
The results were described in a news release, and the company said that both studies had been submitted for online publication Thursday. One of those studies has been accepted for publication in a scientific journal. Both studies are small, and the researchers said they had released the results early because of intense interest from the pub