New research indicates two doses of the vaccine boosts immunity from 74 to 94 percent<\/p>\n<\/h3>\n
<\/b><\/p>\n
<\/b><\/p>\n
TUESDAY, Sept. 21, 2021 (HealthDay News) — Getting a second dose of the Johnson & Johnson COVID-19 vaccine substantially increased its protection, the company announced Tuesday.<\/p>\n
According to the results of a new clinical trial, two doses of the vaccine boost immunity to 94 percent from the 74 percent offered by a single dose, the company said in a statement<\/a>.<\/p>\n “Our single-shot vaccine generates strong immune responses and long-lasting immune memory. And, when a booster of the Johnson & Johnson COVID-19 vaccine is given, the strength of protection against COVID-19 further increases,” Mathai Mammen, M.D., Ph.D., global head of Janssen Research and Development at Johnson & Johnson, said in the statement.<\/p>\n Two shots are also 100 percent effective against a severe bout of disease, the company claimed. But that estimate is not certain, The New York Times<\/em> reported.<\/p>\n The new data have been submitted to the U.S. Food and Drug Administration. Since the single-dose Johnson & Johnson vaccine was approved in February, nearly 15 million Americans have gotten it, The Times<\/em> said.<\/p>\n