This green 🙌

“Available data suggests that the observed reduction in risk in the UK is likely to be partly a reduction in intrinsic severity of the virus and partly to protection provided by prior infection.”

(Important explainers in super helpful @kallmemeg thread below) https://t.co/5uQPEM4OzP pic.twitter.com/P7lIln3MkD

— Meg Tirrell (@megtirrell) December 23, 2021