Following the outbreak of severe measles in Taiwan and Japan, the United States also issued a warning of measles in New York. According to the Cbs Broadcasting Inc (CBS), New York state health officials said in April 22nd that, in view of the possibility of two European tourists infected with measles, to prevent the outbreak, they were particularly appealed to people in New York, New Jersey and Connecticut. According to reports, the official said the two European tourists visited the New York Brooklyn Jerzy and the witness Kingdom Hall last Sunday, and then went to the Jehovahs witness stand on the Jehovahs town of Tuxedo Park and the small town of Paterson. It is understood that measles virus transmitted by air and saliva is highly contagious. The virus can stay in the air for several hours. The incubation period of measles usually ranges from 10 to 12 days. The health department of New York state reminds the citizens who have visited the above sites in recent years if they have symptoms of fever, rash, coughing, conjunctivitis or runny nose, and should immediately go to the hospital and notify the relevant units to prevent the spread of the epidemic.