In one of his first executive orders after taking office, President Trump ordered the United States to withdraw from the U.N.’s World Health Organization, putting numerous WHO programs at risk, including efforts to tackle tuberculosis and HIV/AIDS. Lawrence Gostin, a professor of global health law at Georgetown University, says the move is a “grave mistake for American national interests and our national security,” as well as “an attack on science, public health and public health institutions.” He warns that the U.S. will likely fall behind on public health innovation and disease prevention, putting the country and the world at greater risk to “the next pandemic.”