As the new coronavirus continues to spread around the world, here are some of the most important questions researchers and doctors – as well as policymakers and economists – are still trying to answer It has been only three months since reports first emerged from China of an unknown virus causing unusual cases of pneumonia, and scientists and public health experts already know more about it and how it works than at the same point in earlier outbreaks.
But there's still a lot they don't know. As the new coronavirus continues to spread around the world, here are some of the most important questions researchers and doctors – as well as policymakers and economists – are still trying to answer: How contagious is the virus? The virus spreads