Well, there was a claim published a couple days ago that 1 out of 7 tested in NY had antibodies. 1/7th is a lot less than the 39% figure he cites.
That report is wrong they tested 3000 people randomly at grocery stores out of those 3,000, 1,100 had the antibodies!!!
The numbers I saw were 21% in NYC, with lesser numbers across the state. I too don't know where he got the 39% number.