To provide some wider context to the recent declarations by Andrew Pollard, JCVI chair, I'm retweeting a thread I wrote a few weeks ago.

(Sorry for the screenshot @breeallegretti, but it was only way I found to fit all the info in the same tweet). https://t.co/6zte6N0kFp pic.twitter.com/tSZMYNfEed

— Prof Francois Balloux (@BallouxFrancois) August 10, 2021