The WHO's explicit mandate, given to it by the US and the other countries that wrote the International Health Regulations (2005), is to strongly discourage trav

The WHO's explicit mandate, given to it by the US and the other countries that wrote the International Health Regulations (2005), is to strongly discourage travel restrictions. The types of travel restrictions that the US and other countries implemented early on were nearly useless. Plenty of infected people got through, and because the US was not following the WHO's advice to test extensively in order to track the spread of the virus, the US was unaware of the growing outbreaks in places like NY. The US would have done far better if it had followed the WHO's advice, and instead of banning travelers from individual countries, had done everything possible to ramp up testing in January and February 2020. Travel restrictions can be effective, but only when they are extremely strict and backed up by extensive testing. China and other countries that successfully eliminated the virus did so not just by closing borders, but through a combination of strict lockdowns, mass testing and travel restrictions. You can see how important these other measures are by looking at what's happening in Guangdong, in Southern China, right now. Despite the border restrictions, there's a new outbreak, and the authorities are conducting mass testing, doing extensive contact tracing of every known case and imposing local lockdowns to try to quench it. I explained this here: https://news.ycombinator.com/item?id=27342556 https://news.ycombinator.com/item?id=27342556