China reported on Saturday a rise in new coronavirus infections, mostly in travellers arriving from abroad, as doctors in the central city of Wuhan, where the virus initially emerged, warned its behaviour was still not well-understood, Reuters reported. Tough curbs imposed in China since January have reined in infections sharply since the height of the pandemic in February, although it has spread worldwide to infect 1.6 million people with 100,000 deaths. But Chinese authorities fear the possibility of a second wave triggered by arrivals from overseas or asymptomatic patients. While some experts do not expect a big second wave, thanks to China's stringent controls, the possibility could not be ignored.
