By 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.

READ MORE: 7-Month-Old With Rare Genetic Condition Sent Home From Hospital For The First Time Since Being Born

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.

READ MORE: Market Basket Worker Hoping To Spread Kindness Helps Veteran Pay For Groceries

“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.

MORE NEWS: Keller @ Large: Some Republicans Ramp Up Appeals To Get Vaccinated, But Not So Much In Massachusetts

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. Staff