Symptoms of H1N1 in adults are much like traditional flu symptoms, including body aches, headache, fever, cough and sore throat, according to WebMD. Fatigue, chills and runny nose are additional symptoms; some people also develop vomiting and diarrhea. H1N1, or swine flu, is diagnosed through a rapid flu test, and H1N1 is usually treated with antiviral drugs, such as Relenza or Tamiflu.
Some symptoms of H1N1 are more severe and require immediate medical attention, advises WebMD. These symptoms include shortness of breath, difficulty breathing, dizziness with a sudden onset, persistent or severe vomiting and confusion. Those experiencing flu-like symptoms that seem to improve but come back with a worsening cough or fever should also seek care right away.
Most H1N1 cases occur in children and younger adults, notes WebMD. Pregnant woman are up to six times as likely to get H1N1 as nonpregnant women. People with chronic obstructive pulmonary disease, chronic lung conditions, asthma and cardiovascular conditions are also more prone, as are people with liver disease or liver problems, kidney problems, sickle cells disease and other blood disorders, neuromuscular and neurological disorders and diabetes. Those infected with HIV or who have suppressed immune systems, live in nursing homes or are elderly are at heightened risk.