It turns out I’m not alone. Protocol reported in March 2020
that KX, as he’s referred to, is the ‘the least well-known’ of Mark Zuckerberg’s inner circle, despite working at Facebook since 2006. He took up the head of health role in 2018, despite no medical background, but has several bona fide public health experts in his team.
The call to clamp down on all anti-vax content is significant and suggests that KX, whose work on Groups in 2016 led to Facebook creating a blood donation tool, has intervened before things got out of hand.