www.theguardian.com/world/2020/jun/01/spate-of-possible-uk-coronavirus-cases-from-2019-come-to-light?CMP=Share_iOSApp_Other
A friend of mine had severe cold in December and had an antibody test last week and it came back positive.
Others also now saying they had bad cold/flu like illnesses back then which in retrospect could have been COVID.
If COVID was here in December then it’s possible it could have been here even before that.
if not, then it still means that an awful lot more people will have had and recovered from the virus. Also it puts the risk level down because the risk is based on the number of cases since February. Considerably more cases than that reduces the risk level.
And, if people are still testing positive for antibodies then this is a positive step towards the belief that we do develop immunity.