We show case and death counts had significantly lower growth rates at higher temperatures (>14 °C) when aligned for stage in the epidemic. We show irradiance and in particular solar zenith angle in combination with cloudopacity explain COVID-19 morbidity and mortality growth better than temperature.
Experts offer four benchmarks that can serve as a guide for cities and states, eliminating some of the guesswork. Hospitals in the state must be able to safely treat all patients requiring hospitalization, without resorting to crisis standards of care; the state needs to be able to at least test everyone who has symptoms; the state is able to conduct monitoring of confirmed cases and contacts; and there must be a sustained reduction in cases for at least 14 days.
There is "no evidence” that people who recover from COVID-19 and have antibodies are protected from a second infection. "People who assume that they are immune to a second infection because they have received a positive test result may ignore public health advice. The use of such certificates may therefore increase the risks of continued transmission."
Covid Economics, Issue 9, 24 April 2020 (Covid-19 and the macroeconomic effects of costly disasters, Air passenger mobility, travel restrictions, and the transmission of the covid-19 pandemic between countries, A cost-benefit analysis of the Covid-19 disease...)
How to spot a doctor before the invention of the stethoscope -- Wee (urine flasks), wigs (doctors sported what was known as a full-bottomed wig, which was as identifiable as the long wigs of judges or the pigtailed ones of barristers today)...