German Medical Association president Klaus Reinhardt has been forced to clarify his position on mask-wearing after his claim that there was no “scientific evidence they are actually helpful” sparked an outcry from politicians and doctors. Reinhardt told a TV talk show on public broadcaster ZDF that he had doubts wearing simple non-medical masks outdoors was effective against the coronavirus. Such face coverings, he said, offered “no protection at all” to those wearing them, and only “very little protection against infecting others.” A sharp rise in coronavirus cases across Germany in recent weeks has led to stricter rules in many cities,...