Paul, you asked about my source:

E13 – The Evolutionary Lens with Bret Weinstein & Heather Heying | Herd Immunity Won’t Save Us | DarkHorse Podcast
May 10, 2020 Bret Weinstein Season 2 Episode 13

http://www.buzzsprout.com/424075/3692938-e13-the-evolutionary-lens-with-bret-weistein-heather-heying-herd-immunity-won-t-save-us-darkhorse-podcast