Johnson & Johnson Asks US Regulators to Authorize COVID-19 Booster Shot

Vials of the Johnson & Johnson COVID-19 vaccine are seen at a pharmacy in Denver, Colo., in a file photograph. David Zalubowski/AP Photo

Johnson & Johnson on Tuesday asked the Food and Drug Administration (FDA) to authorize a second shot of its COVID-19 vaccine.

The New Jersey-based company officially asked for an expansion of the emergency use authorization that U.S. regulators granted in late February for the single-shot vaccine.