Natural coronavirus immunity could be TWICE as common as experts thought, PHE says

Research among 2,847 key workers from the NHS, police and fire service in June found that 25 per cent of participants had high levels of T-cells which recognised Covid. https://www.dailymail.co.uk/news/article-8968265/Are-25-immune-Covid-19.html?ns_mchannel=rss&ns_campaign=1490&ito=1490