What are the symptoms of influenza A (H1N1) in humans?

When people are infected with swine flu viruses, their symptoms are usually similar to those of normal seasonal influenza. These include fever, tiredness, lack of appetite, coughing and a sore throat. Some people may also have vomiting and diarrhea. In Mexico, some people infected with influenza A (H1N1) have had severe illness and died. However, in almost all cases outside Mexico, including India, the symptoms of influenza A (H1N1) have been mild, and people have made a full recovery.