As coronavirus continues to spread across the world, a simple solution has been repeated by some leaders: Warm summer temperatures will stop the outbreak in its tracks. U.S. President Donald Trump floated the idea that by April the coronavirus problem would solve itself. He told a crowd at a Feb. 10 rally in New Hampshire: “You know, in theory when it gets a little warmer, it miraculously goes away, that’s true.” In Southeast Asia, officials in Indonesia have offered the warm climate as the reason that no cases have been diagnosed there.