More than 200 scientists write to the government calling for tougher measures to tackle Covid-19.
The early trickle of new coronavirus infections has turned into a steady current. By creating simple simulations, we can see how to slow it down
New studies in several countries and a large coronavirus outbreak in Massachusetts bring into question reassuring assertions by US officials about the way the novel virus spreads.
Taken together, our results indicated that the primary SARS-CoV-2 infection could protect from subsequent exposures, which have the reference of prognosis of the disease and vital implications for vaccine design.