Cough that may produce mucus
Fever or chills
Shortness of breath
Chest pain when breathing or coughing
Rapid breathing
Rapid heartbeat
Fatigue or weakness
Sweating
Nausea or vomiting
Confusion, especially in older adults
Bluish lips or fingernails
Symptoms that get worse instead of better
Symptoms after a cold, flu, or respiratory infection
Seek urgent medical care if breathing is difficult, chest pain is severe, or lips or fingernails turn blue