Medical researchers have been studying everything we know about COVID-19. What have they learned – and is it enough to halt the pandemic?
The Guardian: What do scientists know about COVID-19 so far?
In this picture taken on April 29, 2020, an engineer looks through a microscope at monkey kidney cells as he checks tests on an experimental vaccine for the COVID-19 coronavirus inside the Cells Culture Room laboratory at the Sinovac Biotech facilities in Beijing.
