Real-time tracking of SARS-CoV-2 spread and evolution

Richard Neher
Biozentrum, University of Basel

slides at

by Trevor Bedford
by Trevor Bedford

Tracking diversity and spread of SARS-CoV-2 in Nextstrain

Available data on Jan 26

Early genomes differed by only a few mutations, suggesting very recent emergence
→ the closest to "real-time" we have experienced so far...
Figure by James Hadfield/Emma Hodcroft
Mutations accumulate constantly, but most of them are irrelevant and rare.
The genome accumulates about two mutations a month...
Diversified into multiple global variants. Groups 20A/B/C have taken over.


Trevor Bedford and his lab -- terrific collaboration since 2014

especially James Hadfield, Emma Hodcroft, Ivan Aksamentov, Moira Zuber, and Tom Sibley

Data we analyze are contributed by scientists from all over the world

Data are shared and curated by GISAID