And as pointed out by @mugecevik, this pattern — imported variant causes spikes in prevalence that then peter out — is not new. Some of you may remember 20A:EU1 (originated in Spain) that arrived last summer to much fanfare but never took hold here https://t.co/d2j4pTLTK1

— John Burn-Murdoch (@jburnmurdoch) May 17, 2021