Q: CanH1N1 cause pneumonia or heart failure? What are the warning signs?
Dr. Anand: H1N1 can cause serious complications, including viral or secondary bacterial pneumonia and, rarely, cardiac problems. Warning signs include breathing difficulty, persistent or worsening fever, chest pain, bluish lips, confusion, extreme weakness, low oxygen levels, persistent cough, or sudden deterioration after initial improvement, requiring urgent medical evaluation.