Developments on the ground in the past 24 hours come as the worldwide total of confirmed infections edged toward 200,000, with some 8,000 dead from COVID-19.
The European Union's extraordinary measure reverses an earlier reluctance by member states and follow suit with the U.S., which has banned non-citizens from EU countries.
The office of the prime minister said Thursday that Sophie Grégoire Trudeau had begun experiencing a low-grade fever and other mild flu-like symptoms, prompting the test.
The two-time Oscar winner tweeted from Australia, where he is preparing to shoot a film about Elvis Presley. Hanks and Wilson are both 63, which places them in a somewhat elevated risk category.
The security officers, all of whom work at Norman Y. Mineta San Jose International Airport, are the first confirmed cases of the virus within the Transportation Security Administration, officials say.
The United Kingdom's health minister has also been diagnosed with coronavirus – one of nearly 400 confirmed cases in that country, as Turkey on Wednesday announced its first case.
Almost 200 people have died from COVID-19 in Italy and over 4,000 have tested positive. Though the capital is far from the epicenter in the north, its famed tourist sites are nearly empty.