I think the studies refer to UV-C light and warmer temps / high humidity.
To square that circle they would have to show that
outside / direct heat-strong light exposed longer-lived fomites / aerosols are a major route of disease transmission when compared to direct "person-to-person" / recent / non heat-strong light exposed fomite / aerosol transmission. And they need to show that removing one will not just be supplanted by the other.
I have not heard of any studies that have done that. The general conclusions that I have seen lend more to the notions of "lab tests show in isolation" "we hope that may reduce the infection prevalence but we don't know" .
That it my book means "let's see" rather than making definitive statements about "2nd waves" and this "going away in summer" which is what I was remarking on.
That doesn't mean that it might not go away in the summer. What it means is that there is no strong scientific path which leads to that conclusion yet. Or I haven't seen one yet.
Every country is seeing cases - whether they are warm or not. Vitamin D is a factor (it
seems) so that
might preclude places without long-term good weather. Most warm countries have lower resources for tracking, testing so records are not as comprehensive.
Australia is one exception but it is out of the way and cases arrived recently in Aus.
There was a spike and exp. growth pattern up until and just after the lockdown on the 25th.
During 2020 daily temperatures in Aus (Sydney) were as follows (not sure where the cases were specifically) - from
Climate Data Online .
So even despite these warm temps Aus CV case numbers were spiking - the just introduced social restrictions soon after this.
The "lockdowns" have disrupted case growth patterns which makes it even harder to compare early affected nations to the more recent ones in Africa / Australasia.
-
Re Vitamin D
"Vitamin D is now known to be of physiological importance outside of bone health and calcium homeostasis, and there is mounting evidence that it plays a beneficial role in the prevention and/or treatment of a wide range of diseases. In this brief review the known effects of vitamin D on immune function are described in relation to respiratory health. Vitamin D appears capable of
inhibiting pulmonary inflammatory responses while enhancing innate defence mechanisms against respiratory pathogens. Population-based studies showing an association between circulating vitamin D levels and lung function provide strong justification for randomized controlled clinical trials of vitamin D supplementation in patients with respiratory diseases to assess both efficacy and optimal dosage."
Vitamin D and respiratory health .
"
Supplement can decrease risk of respiratory infections in children
By
Sue McGreevey MGH Public Affairs
A study led by
Harvard researchers of Mongolian schoolchildren supports the possibility
that daily vitamin D supplementation can reduce the risk of respiratory infections in winter. In a report that will appear in the journal Pediatrics and that has received early online release, an international research team found that vitamin D supplementation decreased the risk of respiratory infections among children who had low blood levels of vitamin D at the start of the study.
“Our
randomized controlled trial shows that vitamin D has important effects on infection risk,” says
Carlos Camargo of Harvard-affiliated
Massachusetts General Hospital (MGH), the study’s corresponding author. “In almost 250 children with low blood levels of vitamin D during winter, we found that taking a daily vitamin D supplement cut in half the risk of a respiratory infection.”
Camargo is a professor in the
Department of Epidemiology at
Harvard School of Public Health and a professor of medicine at
Harvard Medical School.
Several recent investigations have suggested that vitamin D — best known for its role in the development and maintenance of strong bones — has additional important roles, including in immune function."
Vitamin D’s impact on infection
Opinion | Vitamin D and Coronavirus Disparities
Note: brehs have higher prevalence vitamin D deficiency in the West which might be why we see the higher affected proportion in both the USA and the UK. I'd imagine this is true of latinos too in general but don't know.
@Jesus is my protector I will not point out your issues to you or you might call on the @mods to protect you "the damsel in distress" again. Stop @-ing me with your irrationality.