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New Johnson & Johnson data show high booster shot effectiveness

Data from a phase III trial demonstrate a 94-percent protection against Covid-19 with a Johnson & Johnson booster shot.

Photo: Jens Dresling

An additional dose of Johnson & Johnson's Covid-19 vaccine has shown an effectiveness of 94 percent, the company just announced in the published results of a phase III trial.

The vaccine from Johnson & Johnson, which was previously a part of the Danish vaccination program, has demonstrated a single-dose vaccine efficacy of 70 percent.

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