The Centers for Disease Control and Prevention (CDC), a United States government agency, reports that the symptoms and transmission of the swine flu from human to human is much like seasonal flu. Usually, the symptoms are fever, lethargy (feeling tired), lack of appetite and coughing. Some people with swine flu also have reported runny nose, sore throat, nausea, vomiting and diarrhoea. It is believed to be spread between humans when an infected person coughs or sneezes and then touches something. Another person then might touch the same thing with the virus on it and then touch their own nose or mouth. The swine flu in humans is most contagious during the first five days of the illness although some people, most commonly children, can be contagious for up to ten days. Diagnosis can be made by sending a specimen (sample), collected during the first five days, to the CDC for analysis.