(12-17-2020, 08:33 AM)OutsiderFan Wrote: It seems there is clearly a segment of the population that is not taking the precautions necessary to stop spread.
Kind of true by definition, but it assumes that we know what those precautions are and that they exist. It may be true that only physical separation or hazmat suits are adequate. Masks may help but not enough if people are too close for too long. We just don't know. The only places that have actually contained this epidemic have done so at a very low level of disease. We never got there, and Europe got there but couldn't maintain it.
Quote:Asa a slice of the roughly 2 million Santa Clara County residents, what is that percentage? Do we know if it is 5%, 10%, 20%? And do we know the profile of those who are getting sick? Age? Ethnic background? Location in county? Or is it a wide cross-section? Then, can we identify any behavior those who are sick have engaged in that can be identified as a common denominator?
As of now, we don't really know what is driving the spread. I am virtually certain that if Dr. Cody knew what people were doing to spread the disease, she would have identified it and taken steps to combat it. Is non-compliance the issue, or is this virus just a real bitch? Probably both, but exactly how and in what ratio I don't think we know.
Quote:After seeing the study on NPI efficacy, it is clear full shutdowns are not necessary to stop spread.
Or that the NPI study is missing some factor that invalidates it's analysis.
Quote:But this does not mean spread can stop without full shutdowns and Shelter in Place orders. What I mean is if a large enough percentage of the population continues to engage in risky behavior, the spread is not going to stop even with stay at home orders that keep businesses open, because that segment of the population is where all the spread is happening. If you have 80% following safety protocols, there is still 20% of the population not being safe. That's still 200,000 people engaging in risky behavior who are going to be infected. So no matter if the 80% is safe, you are still overwhelming the hospitals with the 20% not following guidelines. It's almost akin to AIDS when some people refused to wear protection during sex.
As you may know, I have been saying full SIP probably would be required for about three weeks. I am not as sure as you are that people not being "safe" is the problem. It may be that our definition of "safe" isn't. Obviously, it isn't absolute even best case. As the prevalence of disease goes up, it becomes more likely you will get sick even if you take precautions. This effect may also be non-linear, which doesn't help.
For sure, there are some people who don't attempt to be safe. How many, I have no idea, and I am not sure anybody else really knows either. If such a group exists, we haven't identified it yet. I strongly suspect, but can't prove, that many positive cases are not isolating, and that messes up attempts to be "safe". I do know that 50% of the cases don't reveal any contacts, and that is a problem too. The contacts start spreading disease without knowing it until they actually have symptoms. Both these things drive Reff up. It is also "probable" IMHO that people are being safe a large percentage of the time but not all the time, often inadvertently doing something they shouldn't. With this virus, that level of compliance may not be enough.