O Really wrote: ↑Mon Apr 20, 2020 1:06 amJust guessing, but I'd say 1%. Looking at some possibly unrelated numbers, it looks like Duval/St. Johns have a fairly low reported rate, about .01% (1,000 out of 1mill) and assuming it's at least 10 times that for actual number (some have guessed at 50 times reported), that would be the 1%. A lot of the infected are going to be sick, though, and not go out to the beach, but a lot more either (a) have no symptoms or (b) don't think whatever symptoms they have are corvid; or (c) think even if they have corvid it's not bad enough to infect. So if there were 500 people on the beach, and at least 5 of them were actively infected, they could definitely do some damage over the course of an hour or so interacting with the crowd. If each of the 5 only manages to infect two people in their hour, then we have 10 cases wandering back out into the city. If those happen to have jobs where they interact with people, they start getting a cluster.Vrede too wrote: ↑Mon Apr 20, 2020 12:04 amWhat are the chances that 1%, 5%, 10% or more in that crowd are infected or carriers?O Really wrote: ↑Sun Apr 19, 2020 11:45 pmDuval and St. Johns Counties, where that beach is (Duval) have about 1,000 reported cases and about 20 deaths. Given that the actual number of cases is considered to be way above the official reports, that one can be infected with no symptoms, and that one can transmit virus before symptoms, what are the chances nobody out there in that crowd is infected?
That may not sound like much, but if you consider the New York mess was started by one guy who went to his synagogue and then rode the subway into the city, passed through Grand Central, and went to work at his law firm.
Great example
https://nymag.com/intelligencer/2020/03 ... ction.html
"You call a friend and arrange to meet for lunch. It’s unseasonably springlike, so you choose a place with outdoor seating, which seems like it should be safer. As usual, you take all reasonable precautions: You use hand sanitizer, sit a good distance from other customers, and try to avoid touching your face, though that last part is hard. A part of you suspects that this whole thing might be overblown."
"What you don’t know is that ten days ago, your friend’s father was a guest of his business partner at the University Club, where he caught the novel coronavirus from the wife of a cryptocurrency speculator. Three days after that, he coughed into his hand before opening the door of his apartment to welcome his son home. The saliva of COVID-19 patients can harbor half a trillion virus particles per teaspoon, and a cough aerosolizes it into a diffuse mist. As your friend walked through the door he took a breath and 32,456 virus particles settled onto the lining of his mouth and throat."
"Viruses have been multiplying inside his body ever since. And as he talks, the passage of his breath over the moist lining of his upper throat creates tiny droplets of virus-laden mucus that waft invisibly into the air over your table. Some settle on the as-yet-uneaten food on your plate, some drift onto your fingers, others are drawn into your nasal sinus or settle into your throat. By the time you extend your hand to shake good-bye, your body is carrying 43,654 virus particles. By the time you’re done shaking hands, that number is up to 312,405."
"One of the droplets gets drawn into the branching passages of your lungs and settles on the warm, wet surface, depositing virus particles into the mucus coating the tissue."
And later arm in arm at Jacksonville area beach bars they celebrated a great day on the beach.