Symptoms of influenza (flu) can include: fever cough sore throat runny or stuffy nose body aches headache chills fatigue some people may also have vomiting and diarrhea. People may be infected with the flu, including 2009 H1N1 flu, and have respiratory symptoms without a fever.
The number of immigrants from Mexico and Europe living in the U.S. has actually declined slightly since 2010, but Mexicans still make up the largest immigrant population in the United States, with 11.6 million legal and illegal immigrants residing here.
Between 2007 and 2008, the Indian foreign-born population surpassed the Chinese and Hong Kong-born population to become the third largest immigrant group in the United States after immigrants from Mexico and the Philippines (see Table 1; see also the pie charts showing the top 10 countries of birth of immigrants residing in the United States over time here.).