London St Pancras has deployed robots, they look like air purifiers on wheels, that go about the station emitting ultraviolet light that apparently kills the virus & pretty much all bacteria
In regards to herd immunity by natural infection, a heated debate over such a point developed between Senator Dr. Rand Paul & Dr Anthony Fauci during the latter's congressional hearing in the Senate in which Paul an ophthalmologist favors herd immunity by natural infection & Fauci an immunologist & Director of the National Institute for Allergy and Infectious Diseases for 36 yrs raises several problems with that approach, also citing the Director of the Center for Disease Control
In addition to that here is an article published by The Mayo Clinic, one of the most prestigious & regarded medical institutes in the world (ranked number 1 in the United States for 2019-20 U.S. News & World Report Best Hospitals Honor Roll), in regards to herd immunity
https://www.mayoclinic.org/diseases-cond...t-20486808
"However, there are some major problems with relying on community infection to create herd immunity to the virus that causes COVID-19. First, it isn't yet clear if infection with the COVID-19 virus makes a person immune to future infection.
Research suggests that after infection with some coronaviruses, reinfection with the same virus — though usually mild and only happening in a fraction of people — is possible after a period of months or years. Further research is needed to determine the protective effect of antibodies to the virus in those who have been infected.
Even if infection with the COVID-19 virus creates long-lasting immunity, a large number of people would have to become infected to reach the herd immunity threshold. Experts estimate that in the U.S., 70% of the population — more than 200 million people — would have to recover from COVID-19 to halt the epidemic. If many people become sick with COVID-19 at once, the health care system could quickly become overwhelmed. This amount of infection could also lead to serious complications and millions of deaths, especially among older people and those who have chronic conditions."
This was why the UK Government abandoned it's original herd immunity strategy because the projections were that the health system would be completely overwhelmed, hence the "Protect the NHS" part of the slogan. The whole point of the lockdown was not beat the virus it was to buy us time in order to establish an affective and robust test, track & trace system, the Government completely failed in doing so & now after opening up again we are unsurprisingly going backwards.
My cousins volunteered for track & trace & said that they spent most of the time doing nothing. My sister had to get a test after someone she was socialising with tested positive, she got the all clear but track & trace did not contact her until 9 days after at which point they just told her to isolate for the remaining 5 days (how many people could she of infected in that time had she not known) & there was a story about a plane for a small airline company that had an outbreak of the virus & the company only found out that this had happened on one of their planes when The Guardian contacted them for comment because track & trace hadn't got round to it yet
On top of that testing is an absolute mess. My sister was clearly one of the lucky ones because people have struggled to test, up to 750K requests unanswered every day. Demand is said to be outstripping means by 3 or 4 to 1 & The head of Test & Trace, Dido Harding, told the Commons Science & Technology committee that they were not expecting a surge in cases.