The Food and Drug Administration’s vaccine advisers gave a thumbs-up to vaccines from Moderna and Pfizer for the littlest kids. “You can’t compare the vaccines directly.”If the FDA agrees with its advisers and authorizes the shots, there’s one more step. Moderna’s shots are one-quarter the dose of the company’s adult shots. “You can’t compare the vaccines directly.”If the FDA agrees with its advisers and authorizes the shots, there’s one more step. “You can’t compare the vaccines directly.”If the FDA agrees with its advisers and authorizes the shots, there’s one more step.