By CBSBoston.com Staff

BOSTON (CBS) – Johnson & Johnson says its vaccine is effective for at least eight months and protects against the Delta variant.

20 people in Boston were part of a small study conducted by doctors at Beth Israel Deaconess Medical Center and Harvard Medical School.

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Doctors found the vaccine generates both a strong antibody response and creates immune cells known as T-Cells, which can help protect people longer from severe illness.

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“The durability – the length of time these immune responses last – is really remarkable. We’ve tested eight months and there’s really no evidence of decline over the eight-month period, so we do believe these responses will go on for a lot longer than that,” said Dr. Dan Barouch, Director of the Center For Virology and Vaccine Research at Beth Israel.

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A second study including people in Boston and across the country also found the vaccine is effective against a range of variants, including Delta and those first detected in South Africa and Brazil.

CBSBoston.com Staff