Do we know of any stats estimating the percentage of the population who have not reported a positive case? I saw a daily mail article quoting 60% but couldn’t find the original source and it’s out of date now. Do you think there are any people who are resilient to it or is it pure luck. In our school some families are catching it twice, some three times some not at all despite equal exposure. I don’t have a particularly wild life .nor am I cautious. I’d say I’m doing “just enough “ but have never caught it. My neighbour works in a nursery , has three children at different school buildings) infants, junior , senior).. never caught it but tests regularly for work. Shall I put ourselves forward for medical research 