China still faces the “big challenge” of a potential second wave of Covid-19 infections, the country’s top respiratory authority has warned, with the lack of immunity among the community a serious concern as the race to develop a vaccine continues.
China still faces the “big challenge” of a potential second wave of Covid-19 infections, the country’s top respiratory authority has warned, with the lack of immunity among the community a serious concern as the race to develop a vaccine continues.
