The U.S. State department has issued a level 4 advisory for Wuhan, recommending people “do not travel” to Hubei Province.
A level 3 warning has also been issued for all of China, which means people should “reconsider traveling” to the country.
According to U.S. Vice President Mike Pence, President Trump has offered President Xi assistance in combating the coronavirus.
In the U.S., travelers are being screened at 20 airports.
The U.S. government is also evacuating American citizens and diplomats from Wuhan.
Other countries such as France and Japan are considering doing the same.
China is also expanding efforts to contain the virus. People traveling from Wuhan are required to register and self-quarantine themselves.
Travel in some areas has also been restricted.
The coronavirus has killed 81 people and infected more than 2,800 so far. Coronavirus cases have been confirmed across east Asia, one in France and five in the U.S..