Decision will delay approval for 12- to 17-year-olds
                                
                                
                                    (Newser) -
                                    With several European nations rethinking their endorsements of giving the Moderna vaccine to young people, the FDA will study a potential side effect longer before deciding on approval. The issue is myocarditis, a rare inflammatory heart condition, the  Wall Street Journal  reports. Finland, Sweden, Denmark, and Norway have called for...