According to the Chinese Communist Party, China has been doing a wonderful job in prevention of COVID-19 transmission. I don't know if that claim is true but, I do know that over the eons, the Chinese have been effectively fighting an equally insidious enemy; The Ghost
The Chinese campaign against ghosts is based on facts that all Chinese know about Ghosts:
First: Ghosts only travel in a straight line. Therefore, forcing a ghost to make turns will prevent the ghost from advancing...
Second: Ghosts do not have knees. Therefore requiring them to step over something on entering a dwelling will prevent the ghosts from entering and they can be warded off with a scary protection image...
Maybe President Trump should concentrate on protecting America from ghosts and leave the protection against COVID-19 to people qualified to make those decisions...