It would be great if 81% of everybody had some resistance to covid-19 due to previous exposure to other corona virus’s and Prof Karol Sikora on Twitter was quite enthusiastic about this survey this morning too. I just think the high percentages infected in the two recent meat processing plant outbreaks (40% or so in Angelsea and 60% in Germany) tend to show that (even if some t-cell resistance is helping) there is still a high potential of catching and being able to spread the disease