The effect of time from vaccination and Delta in frontline health care workers, a new @CDCMMWR report
Decline in effectiveness vs infections (any) from 91% to 66% (point estimates), pre to intra-Delta wavehttps://t.co/YkuSCgNCUy pic.twitter.com/GOI7KdnbEm

— Eric Topol (@EricTopol) August 24, 2021