Due to insufficient data available, it is believed that people who are at higher risk for seasonal influenza complications are to be at higher risk for swine- influenza complications

Groups at higher risk for seasonal influenza complications include:

• Children less than 5 years old;
• Persons aged 65 years or older; (Uncertain)
• Children and adolescents (less than 18 years) who are receiving long-term aspirin therapy and who might be at risk for experiencing Reye syndrome after influenza virus infection;
• Pregnant women;
• Adults and children with chronic pulmonary, cardiovascular, hepatic, hematological, neurologic, neuromuscular, or metabolic disorders;
• Adults and children with immunosuppression (including immunosuppression caused by medications or by HIV);
• Residents of nursing homes and other chronic-care facilities. ²⁰

Signs and symptoms that indicate the need for urgent medical attention include:

In children-

• Fast breathing or trouble breathing
• Bluish skin color
• Not drinking enough fluids
• Not waking up or not interacting
• Being so irritable that the child does not want to be held
• Flu-like symptoms improve but then return with fever and worse cough
• Fever with a rash

In adults-

• Difficulty breathing or shortness of breath
• Pain or pressure in the chest or abdomen
• Sudden dizziness
• Confusion
• Severe or persistent vomiting 21