A WHO public health expert has warned that if the coronavirus is allowed to "march through" Sub-Saharan Africa and the Indian sub-continent unarrested, the rest of the world risks being hit by repeated bouts of Covid-19. Professor Lawrence Gostin, director of the World Health Organization's Center on Public Health and Human Rights, told BBC Radio 4's Today program on Wednesday that we are "only as safe as the weakest link in the global chain" on tackling coronavirus. "If you've got Covid rages in other parts of the world, in this interconnected society we live in, it will come back to Europe and the United States." Gostin added that the disease could come back in a "second, third or even fourth wave" if the problem is not tackled globally. He also took a swipe at President Donald Trump for withdrawing US funding for the WHO, saying it could have a "devastating impact." The public health expert said that "in the middle of a once-in-a-century pandemic," it was "deeply concerning and