evidence: FDA advisers back Moderna’s COVID-19 vaccine for older kids [...] Moderna’s COVID-19 vaccine has long been available for adults in the U.S. and elsewhere and more than three dozen countries offer it to children, too. If the FDA authorizes Moderna’s vaccine for teens and younger children, the Centers for Disease Control and Prevention will next decide whether to recommend the shots. [...] The FDA analysis concluded that two doses of Moderna are effective in preventing symptomatic COVID-19 illness in teens and younger kids, with the levels of virus-fighting antibodies comparable to those developed in young adults.