answer:
Currently tens of thousands of cases of (abbreviated “COVID-19”). COVID-19 illnesses, most of them associated with travel from Wuhan, also are being reported around the world including the U.S.A. Imported cases of COVID-19 in travelers have been detected in the U.S. Person-to-person spread of COVID-19 also has been seen among close contacts of returned travelers from Wuhan, but at this time, this virus is NOT currently spreading in the community in the United States. The potential public health threat posed by COVID-19 is high, both globally and to the United States.
CDC response \/ (from a website)
The federal government is working closely with state, local, tribal, and territorial partners, as well as public health partners, to respond to this public health threat.
The public health response is multi-layered, with the goal of detecting and minimizing introductions of this virus in the United States so as to reduce the spread and the impact of this virus.
CDC established a COVID-19 Incident Management System on January 7, 2020. On January 21, 2020, CDC activated its Emergency Operations Center to better provide ongoing support to the COVID-19 response.
On January 27, 2020, CDC issued updated travel guidance for China, recommending that travelers avoid all nonessential travel to all of the country (Level 3 Travel Health Notice).
On February 19, 2020, CDC issued travel guidance for Hong Kong, recommending that travelers practice usual precautions (Level 1 Travel Health Notice).
The U.S. government has taken unprecedented steps with respect to travel in response to the growing public health threat posed by this new coronavirus:
Effective February 2, 2020, at 5pm, the U.S. government suspended entry of foreign nationals who have been in China within the past 14 days.
U.S. citizens, residents, and their immediate family members who have been in Hubei province and other parts of mainland China are allowed to enter the United States, but they are subject to health monitoring and possible quarantine for up to 14 days.
See more at: “Proclamation on Suspension of Entry as Immigrants and Nonimmigrants of Persons who Pose a Risk of Transmitting 2019 Novel Coronavirus external.
CDC issued an interim Health Alert Network (HAN) Update to inform state and local health departments and healthcare professionals about this outbreak on February 1, 2020.
On January 30, 2020, CDC published guidance for healthcare professionals on the clinical care of  COVID-19 patients.
On February 3, 2020, CDC posted guidance for assessing the potential risk for various exposures to COVID-19 and managing those people appropriately.
CDC has deployed multidisciplinary teams to support state health departments with clinical management, contact tracing, and communications.
CDC has worked with the Department of State, supporting the safe return of Americans who have been stranded as a result of the ongoing outbreaks of COVID-19 and related travel restrictions. CDC has worked to assess the health of passengers as they return to the United States and provided continued daily monitoring of people who are quarantined.
CDC has developed a real time Reverse Transcription-Polymerase Chain Reaction (rRT-PCR) test that can diagnose COVID-19 in respiratory samples from clinical specimens. On January 24, 2020, CDC publicly posted the assay protocol for this test.
CDC has been uploading the entire genome of the viruses from reported cases in the United States to GenBank as sequencing was completed.
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