Johnson & Johnson vaccine boosters increase antibodies: Data

The Johnson & Johnson (J&J) company is saying that a booster shot of its COVID-19 vaccine sharply increased levels of antibodies, according to interim data from two early-stage trials. A second dose of the United States company’s single-dose vaccine resulted in binding antibody levels nine times higher than the levels 28 days after people received their first dose, the company said in a news release on Wednesday.