Why Public Health Experts Say Trump's Travel Ban Won't Curb the Spread of COVID-19 in the U.S

https://time.com/5801723/trump-travel-ban-covid-19/

But public health experts warn that even with the travel ban, the virus will still spread. And travel bans risk discouraging people from disclosing their previous countries of travel. The WHO says that denying entry to passengers arriving from affected countries are “usually not effective in preventing the importation of cases but may have significant economic and social impact.”