[lpqiu3699]

At this point I think the proof is already quite clear:

[1] https://www.cell.com/cell-reports-medicine/fulltext/S2666-37...

[2] "The people who are not testing positive in the current outbreak are those who have had COVID-19 previously and recovered. These people account for 9% of Israel’s population but less than 1% of recent infections, according to Kovler’s analysis." source: https://www.deseret.com/platform/amp/coronavirus/2021/7/20/2...

[3] https://newsroom.clevelandclinic.org/2021/06/09/cleveland-cl...