The director of the Centers for Disease Control and Prevention told governors of states to prepare for the "large-scale" distribution of a coronavirus vaccine by November.
A state of emergency has been declared in Michigan after two dams were breached by rain-swollen waters, forcing the evacuation of thousands of residents.
India has partially eased restrictions on the export of anti-malarial drug hydroxychloroquine and paracetamol, cited by some as key to the fight against Covid-19.
Beijing warns it would impose sanctions on US firms involved in a deal to sell $2.2-billion worth ofarms to Taiwan, as it harmed China’s national security.