My take on @WHO press conference on asymptomatic transmission - sounds like a misunderstanding. WHO is drawing a distinction between transmission from people who are fully asymptomatic (never develop symptoms) and pre-symptomatic (haven’t developed symptoms yet). 1/3
We haven’t seen a lot of evidence of fully asymptomatic people transmitting to many others (though admittedly these tracing studies are hard to do). Pre-symptomatic transmission, on the other hand, is why SARS-CoV-2 has been harder to control than SARS-CoV. 2/3
If fully asymptomatic transmission is rare, this could impact how we monitor exposed contacts (how long to quarantine). But otherwise, it seems more of scientific than practical interest. People without current symptoms could be infectious. Act accordingly. 3/3
Adding this good thread.
To clarify, I’m not defending their confusing communications! It’s just that I don’t see a paradigm shift in the science. But I agree with others that absence of evidence is not evidence of absence. These studies are very hard to do, making it particularly hard to quantify.
You can follow @nataliexdean.
Tip: mention @threader_app on a Twitter thread with the keyword “compile” to get a link to it.
Enjoy Threader? Sign up.
Since you’re here...
... we’re asking visitors like you to make a contribution to support this independent project. In these uncertain times, access to information is vital. Threader gets 1,000,000+ visits a month and our iOS Twitter client was featured as an App of the Day by Apple. Your financial support will help two developers to keep working on this app. Everyone’s contribution, big or small, is so valuable. Support Threader by becoming premium or by donating on PayPal. Thank you.