FYI: CDC's Social Media Expansion during Covid
Here is a link to part of the CDC's social media data metrics page. not unexpectedly, the CDC's social media reach expanded during 2020, but what I find surprising is the amount in which it expanded.
I think this shows graphically there is an untapped market for trusted-source health information on Twitter. Unfortunately, I suspect that for many health organizations the social media staff and activities were cut back.
(Note: The CDC's social media data pages are dense with interesting information; for example, they could be useful as a reference standard for Spanish language outreach)