But they are screening anyways it seems here in U.S. per this: While no cases of H7N9 have been detected at this time in the U.S., 54 people with flu-like symptoms after travel to China have been tested. All have 54 tested negative for H7N9; while 6 tested positive for seasonal influenza A, and 3 tested positive for seasonal influenza B. Should a case be detected in the United States, this would not signal an increase in the potential risk to the public’s health unless the transmission pattern of the virus was to change. If a person in the United States has H7N9 flu, they will be isolated (separated from other people who are well) and cared for. In addition, a contact investigation will be done with people who may have been exposed to the sick person. Contact investigations are one of the ways CDC works with partners in the United States and other countries to protect the health of people exposed to an illness. This process involves finding, interviewing, and in some cases, testing or treating the people who came into contact with the sick person. All of this can help confirm that the virus is not spreading further in the United States. At this time, a decision to produce H7N9 vaccine for a U.S. national vaccination response has not been made. However, given the severity of human illnesses from H7N9 in China, HHS and its partners are taking preparedness steps to develop H7N9 candidate vaccine viruses and are planning for H7N9 [link to www.cdc.gov] vaccine clinical trials. [link to www.cdc.gov]