US doubtful over Chinese, Russian COVID-19 vaccine as race heats up

Six months after the World Health Organisation declared a global emergency, the novel coronavirus has killed at least 679,000 people and infected at least 17.9 million, according to an AFP tally. As countries across Western Europe announced new lockdowns and reported historic economic slumps, the UN health body said the pandemic was a "once-in-a-century" crisis and its fallout would be felt for decades. Several Chinese companies are at the forefront of the race to develop an immunity to the disease and Russia has set a target date of September to roll out its own vaccine. But US infectious disease expert...