Frequent handwashing and physical distancing are the pillars of efforts around the world to prevent the spread of the novel coronavirus. But for hundreds of thousands of Rohingya refugees in southern Bangladesh who are now directly threatened by COVID-19, the disease caused by the new coronavirus, effectively practising that advice is nigh on impossible, especially after Cyclone Amphan left the camps in Cox's Bazar a quagmire. Health and human rights officials are warning of a viral outbreak that will harm some of the world's most vulnerable people.