What are the signs and symptoms of swine flu in humans?

Symptoms of swine flu in humans are similar to that of the regular flu, including fever, cough, sore throat, aching body, headache, chills, fatigue, diarrhoea and vomiting. Severe illness including pneumonia and respiratory failure have been reported as being caused by swine flu in people. The virus may heighten the severity of underlying chronic medical conditions, according to the US Centers for Disease Control and Prevention (CDC).