by Jing Xuan TENG and AFP Bureaus BEIJING, China (AFP) — Authorities in China’s Wuhan said Tuesday they would test the city’s entire population for Covid-19, as the virus returned to the place where it first emerged and the highly contagious Delta variant drove tightening lockdowns worldwide. A resurgent virus has returned with a vengeance, buoyed by stalling vaccination rates and deadly new mutations even in places which had long touted their successes in overcoming […]