Does anyone want to venture a guess for the true number of cases in the Bay Area right now?
I just some rough back-of-the-envelope calculations, following the method here. Currently there are 2 deaths in the Bay Area. I keep his time-till-death rate of 17.3 days, but substitute a doubling time of 3 days, based on Our World in Data’s US number. I get 2*100*exp(17.3*.231) ≈ 11,000, or about 2/1000 bay area residents. Super non-robust number, take with several grains of salt.
(.231 is the rate I get when solving for r in the exponential growth function for a doubling in 3 days.)
I’ve been a bit confused about doubling rate. First, I noticed that many numbers (e.g. Wikipedia) are calculating how long it took to double, instead of projecting forward using e.g. yesterday’s increase. Early on this led to misleading numbers, but recently the US has been steady around 2-3 days using both methods.
However, I’m guessing that raw doubling rates depend a lot on testing, and that the US should expect to have a faster-than-actual doubling rate until our testing catches up. So I lean towards Trevor’s number of 5 days.
Does anyone want to venture a guess for the true number of cases in the Bay Area right now?
I just some rough back-of-the-envelope calculations, following the method here. Currently there are 2 deaths in the Bay Area. I keep his time-till-death rate of 17.3 days, but substitute a doubling time of 3 days, based on Our World in Data’s US number. I get 2*100*exp(17.3*.231) ≈ 11,000, or about 2/1000 bay area residents. Super non-robust number, take with several grains of salt.
(.231 is the rate I get when solving for r in the exponential growth function for a doubling in 3 days.)
I’ve been a bit confused about doubling rate. First, I noticed that many numbers (e.g. Wikipedia) are calculating how long it took to double, instead of projecting forward using e.g. yesterday’s increase. Early on this led to misleading numbers, but recently the US has been steady around 2-3 days using both methods.
However, I’m guessing that raw doubling rates depend a lot on testing, and that the US should expect to have a faster-than-actual doubling rate until our testing catches up. So I lean towards Trevor’s number of 5 days.