COVID-19 summary : With 4% the World population, the USA had 33% of COVID-19 new cases yesterday. While Europe is suffering, ominously, Mexico is now #2 to the U.S. in new deaths. But California had four times more new cases than Mexico yesterday. Apparently, the British virus has mutated and can infect people 1.7 times more efficiently. New cases are increasing in Canada, Indonesia and Japan. China had 23 new cases and no new deaths. Taiwan had 3 new cases and no new deaths. From David Leonhardt of The New York Times : I’ve shown you   a version of this chart before . The basic idea is that if you track the number of new virus cases, you can fairly accurately predict the number of Covid-related deaths about three weeks later. Every 100 new cases in the U.S. has led to an average of roughly 1.6 deaths, with a 22-day lag. (Trevor Bedford, a scientist at the Fred Hutchinson Cancer Research Center in Seattle,   explains why  in this Twitter thread.) From colleagues in Florida: Why is this