How coronavirus spreads and why it affects countries differently

New study analysing dozens of actual Covid-19 clusters from around the world shows enclosed spaces are hotbeds of the virus... Using these and other studies, Dr Cevik concludes that they suggest (not prove) the following:

• Close and prolonged contact is required for transmission of the virus. 
• Risk is highest in enclosed environments such as houses, care facilities, public transport, bars and other indoor spaces where people congregate.
• Casual, short interactions are not the main driver of the epidemic. 
• Susceptibility to infection increases with age.

Read here (The Telegraph, May 8, 2020)