(10-16-2020, 07:35 AM)BostonCard Wrote: My hypothesis is that it is that colder weather is pushing people indoors, ... The second wave hit sun belt states (Florida, Texas, Arizona, and California) in the summer, where warm temperatures pushed people indoors. The third wave is concentrated in the Midwest and Mountain West (Wyoming, Alaska, Montana), which are areas that were spared previously and where dropping temperatures have pushed people indoors.
A reminder to those of us in California: There is more to weather than temperature! Precipitation of various kinds may dominate in other areas. And, this year, for California, air quality was perhaps a major factor.
I'm not even sure whether good weather means fewer cases or more. If I were to go to the beach because the weather is great, I'm also more likely to go to the store to stock up on suntan lotion or to buy a new beach chair, and I'm also more liable to eat somewhere other than home. I'm also likely to buy gas, and use bathrooms shared with hundreds of other sun-seekers.
(10-16-2020, 10:44 AM)BostonCard Wrote: ...because the weather has turned south.
An unfortunate description.
I don't believe the temperatures are causing the changes for what you're calling the 3rd wave. Today's infections are from exposures in the first week of Oct. The fact that one can call it a wave indicates the difference has been happening for maybe 3 weeks. Look at
September's average temperature chart. Neither too cold nor too hot.
I feel more comfortable talking about Santa Clara County because I know it much better. We are not yet down to pre-summer levels. As SCC graph shows it, the exponential growth started at the beginning of June and climbed for about 6 weeks before it began to decline. In SCC, temperature is usually the main factor (but the SiP order was probably the major factor, and was pretty constant all summer).
Weather was hotter during the decline in August than it was in June/July.
(10-16-2020, 09:57 AM)teejers1 Wrote: My theory: states hit hard early tend NOT to get hit that hard subsequently, perhaps as a result of vulnerable communities being tagged already, or some form of immunity. And in all events, the second "wave" isn't nearly as deadly as the first (again, maybe vulnerable communities have already taken prior brunt or virus less damaging or whatever). States/places relatively unscathed to date, of course, are subject to first-wave damage seen in other places (though perhaps better medical treatment knowledge or less damaging virus may cap things).
I agree with the concept that those states that had a bad time do well for a while. I disagree with cause, and with "not nearly as deadly as the first" if you mean in raw numbers. But as % deaths, yes.
I believe when people see a lot of bad stuff going on around them, they react. The more they see, the more they respond. I think the citizens of NY/NJ probably kept to themselves and better at social distancing really well...for a while, because they saw how bad it could be.
I think the generic second wave happens because we all grow tired of the newly-adopted behaviors, and grow lax. We think we know what is OK because, well, we've been doing it and we didn't get sick. I don't know that this explains why the 2nd wave often is more cases than the first. Perhaps also involved is index cases being more universally spread in the community so more are exposed.
I admit to thinking of grabbing this opportunity to go visit my grandkids. After all, I've gone 6 months of confinement and haven't gotten sick yet. But then my analytical mind kicks in and looks at the raw number of cases and realizes that I'm MORE likely to be exposed now than I would have been March through June.
The second wave in SCC totally dwarfed the first wave. We're not yet down to the first wave about 3 months after the 2nd peak. So, in terms of people getting infected, the numbers seem worse (but that may be a failure to accurately measure the 1st wave). I think it is clear that the 2nd wave resulted in more deaths than the first in absolute numbers (deaths and deaths per capita) but I think the deaths per case was probably less.