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.
Number of Illegal Immigrants in U.S. May Be on Rise Again, Estimates Say. A Border Patrol agent looking out at Tijuana, Mexico. About six million Mexican-born immigrants make up 52 percent of the unauthorized population in the United States, estimates said. Credit Gregory Bull/Associated Press.