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J&J Says A Booster Shot For Its Vaccine After 6 Months May Have Big Benefits

Johnson & Johnson said that when it gave study participants a second jab after six months, their antibody levels were nine times higher than they were 28 days after a first dose of the COVID vaccine.
A nurse fills a syringe with Johnson & Johnson's COVID-19 vaccine at a clinic in Pasadena, Calif., on Aug. 19.

Johnson & Johnson says it has evidence that people who received its one-shot COVID-19 vaccine could benefit from a booster shot after six months.

The pharmaceutical giant said inWednesday that when it gave participants in a study a second jab of its coronavirus vaccine after six months, their antibody levels were nine times higher than 28 days after their first dose.

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