The flu season in Japan has continued into May, with experts attributing the prolonged spread of infections to low herd immunity and government relaxation of coronavirus measures.Group infections have forced some schools to close entirely or close some classes even after infections peaked in February."This is the first time we've had so many infections," said an official at a private high school in Oita, southwestern Japan, where around 500 people, including staff and a quarter of all students, were infected from May 11 to 22 following a sports festival.Also this month, around 500 students …READ FULL ARTICLE