The Italian researchers’ findings, published by the INT’s scientific magazine Tumori Journal, show 11.6% of 959 healthy volunteers enrolled in a lung cancer screening trial between September 2019 and March 2020 had developed coronavirus antibodies well before February.

https://www.reuters.com/article/health-coronavirus-italy-timing-idUSKBN27W1J2

wooooow
so many death

It showed that four cases dating back to the first week of October were positive for antibodies, meaning they had got infected in September, Giovanni Apolone, a co-author of the study, told Reuters.

Italian researchers told Reuters in March that they reported a higher than usual number of cases of severe pneumonia and flu in Lombardy in the last quarter of 2019 in a sign that the new coronavirus might have circulated earlier than thought.