Prevalence map prior to Feb 2021

Hi -

I’m interested in viewing a strain prevalence map from 3/2020 to 3/2021. In the latest Nextstrain build, I can see the tree from 2019 to present, but prevalence by strain is only visible from 02/2021 onward. Is there a way to see this data prior to 02/2021?

Thank you!

Hey Allison - what exactly do you mean by “prevalence by strain”?

We’ve been timestamping trees since April 2020 (e.g., in July 2021 we changed the URL to include GISAID, e.g., perhaps this is enough to answer your question?