If it survives for 12 hours on surfaces, you only need 1 person to have poor hygiene to expose a LOT of people. And "normal" hygiene levels pass infection around plenty. I wash my hands when I go to the bathroom or before I prepare food. The rest of the time I'm just passing whatever I touch to whatever else I touch. I've given up on not touching my face. I'm sure I'm not the worst in these areas.
As I understand it, you'd have this sort of infection rate with the seasonal flu if there wasn't some level of herd immunity, and you certainly have roughly this level of infection with the common cold - "Con crud" is a thing - it's just not much remarked upon as unexpected.
They're claiming you can't get it by simply breathing the same air, and saying surgical masks are sufficient.
[0] https://www.sacbee.com/news/local/health-and-medicine/articl...
About 175 executives were expected at the Biogen leadership conference on Feb. 26. Employees from Biogen locations around the United States and the world reunited with colleagues they don’t often get to see.
They greeted each other enthusiastically, with handshakes and hugs, and then caught up over breakfast, picking from plates of pastries and the self-serve hot food bar. They were there for two days of discussions and presentations about the future of the Cambridge-based, multinational biotech firm, which develops therapies for neurological diseases. It was the kind of under-the-radar gathering that happens in this region just about every week.
Full article: https://www.bostonglobe.com/2020/03/11/nation/how-biogen-lea...