Sen. Tom Cotton Tom Bryant CottonBattle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates Chris Wallace presses Cotton on 'any hypocrisy' between comments on Supreme Court vacancy in 2016 and today MORE (R-Ark.) is calling for the Trump administration to implement a “targeted travel ban” to stop the spread of a coronavirus from China.

In a letter to members of President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE’s Cabinet Tuesday, Cotton said it may be too late for China to contain the virus within its borders, and called for a ban on all commercial flights between the U.S. and China.

Cotton said U.S. citizens living in China should have the option to return to America, but only under “appropriate, elevated monitoring.”

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He said officials should develop criteria to allow “critical trade” to continue, like cargo flights and seaboard shipping, to minimize the impact on the U.S. economy.

Cotton sent the letter to Secretary of State Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE, Health and Human Services Secretary Alex Azar and acting Homeland Security Secretary Chad WolfChad WolfSenate to hold nomination hearing for Wolf next week Hillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers Democrats slam DHS chief for defying subpoena for testimony on worldwide threats MORE.

"Given the latest developments and the many unknowns about this virus, we ought to follow Benjamin Franklin's maxim: an ounce of prevention is worth a pound of cure," Cotton wrote.

The State Department and the Centers for Disease Control and Prevention are warning Americans to avoid any nonessential travel to China, and the Chinese government has quarantined close to 50 million people in cities across the country.

The administration is also planning to increase screenings for the virus from five to 20 U.S. airports.

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At the same time, United Airlines said it was suspending some flights to mainland China beginning Feb. 1 and lasting through Feb. 8 because of a “significant decline in demand.”

No other airlines have announced similar decisions, but United operates about a dozen flights a day to Hong Kong and mainland China.

U.S. health officials have appeared reluctant to commit to any travel ban, and experts have expressed doubts about a ban's effectiveness at stopping the spread of disease.

For example, the mayor of Wuhan, where the outbreak is believed to have started, acknowledged that more than 5 million people left the city despite the government lockdown.

Earlier Tuesday, Azar said all options are on the table to protect Americans, including travel restrictions. However, he noted that diseases “are not terribly good at respecting borders.”

More than 4,500 people in China have been infected with the virus, and 106 have died. There are only five cases in the U.S., and officials are currently monitoring 73 possible cases in 26 states after a number of people they were previously monitoring tested negative for the virus.