I know he changed his mind, maybe after he became infected or after realizing that his strategy didn't make sense. The only question is whether this decision was made too late, because the virus has spread quite freely for a long time and there is no doubt that a large number of people are infected.

I just check today's data for UK, and even though they only have 17,000+ infected, total deaths is 1019 which is a really big number when compared to Germany (58 000 infected/455 total deaths) or USA (123 000 infected/2229 total deaths). If the first line of defense (doctors and medical staff) get infected, it is game over - Italy is an obvious example of this scenario.