Scientists swabbing London Underground find 'no traces' of coronavirus

Imperial College London staff are taking samples of the air and swabbing surfaces at tube stations and on tube carriages and London buses once a month. https://www.dailymail.co.uk/sciencetech/article-9278671/Scientists-swabbing-London-Underground-no-traces-coronavirus.html?ns_mchannel=rss&ns_campaign=1490&ito=1490