Coronavirus Update: J&J says booster greatly improves COVID-19 vaccine efficacy as experts await FDA decision

Johnson & Johnson became the latest COVID-19 vaccine maker to offer an update on booster doses Tuesday, when it said data from a Phase 3 trial and the real world found protection against hospitalization and death is greatly improved by a booster jab of its one-shot vaccine.

The company JNJ said the data showed 94% efficacy against mild to severe COVID-19 in the U.S. after two doses, up from the 74% achieved by the single jab. The company said the data confirmed that even one dose offers strong and long-lasting protection.

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