A Chinese pharmaceutical company says its researchers are working day and night to find a vaccine against the coronavirus behind the Covid-19 pandemic. Sinovac Biotech says its experimental drug "Coronavac" looks promising for human use after some early success in tests on animals. While the drug still has a long way to go before it is approved, and the initial findings must still undergo a peer review by the global scientific community, human trials of "Coronavac" went ahead in April. The…
