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How coronavirus spreads, and why some are spared – and others not – The Telegraph

New study analysing dozens of actual Covid-19 clusters from around the world shows enclosed spaces are hotbeds of the virus

  • The overall infection rate was six per cent, but it was much higher among friends (22 per cent) and family members (18 per cent).
  • In terms of location, the main risk factors were homes (13 per cent) transport (12 per cent) and dinner and entertainment (seven per cent).
  • Risk of infection is much higher within households or other enclosed environments in which contact is close and sustained.
  • In the outdoors, it falls to something in the 0-5 per cent range.
  • Children, it seems, are not only better able to resist the infection within the home but also less likely to bring it back with them.
  • 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.

https://www.telegraph.co.uk/global-health/science-and-disease/coronavirus-spreads-affects-countries-differently/