T cell immunity ( invisible immunity) seems like the most logical explanation of the virus curve that starts to burn down when the tested population shows a 25-30% covid antibody/infection pos rate.
Some researchers noted back in March that this cycle takes about 70 days to peak and decline. Michael Levitt of Stanford for example.
The cycle is similar regardless of mitigation. So lockdown or not, there is a covid active infection burnout starting at about 25% pos rate...indicating that another 40% or more of the population has active T Cell protection, making the Herd Immunity Threshold ( HIT) about 70% of the population
If this holds, FL and TX have about another 2 weeks before their infection rates start to decline
Fingers crossed
Imo the best vaccine candidates are those that induce both covid antibodies and stimulate T cell response, like this work by DR Patrick Soon-Shiong
https://twitter.com/DrPatSoonShiong/status/1280685592313884672
“If this holds, FL and TX have about another 2 weeks before their infection rates start to decline”
I think SC and GA is that peak. The population in SC are starting to social distance, I am sure this is helping too. I do remember reading those articles about peaking.
There might be another coronavirus (non-deadly type) in the wild that is generating antibodies / T-cells that helps the body to fight the Covid-19. (think cowpox / smallpox case: the vaccine is in nature already, we just need to identify it.)
If so that would explain why we did not see a lot of dying homeless people in the news. Homeless people have been expose to that other virus already. Just possible, hoping it holds true.