A rare neurological disease characterized by loss of reflexes and temporary paralysis. Symptoms include weakness, numbness, tingling, and increased sensitivity that spreads over the body. Muscle paralysis starts in the feet and legs, then moves upwards to the arms and hands. Paralysis can affect the respiratory muscles and cause breathing difficulties. Symptoms usually appear over the course of one day and may continue to progress for 3–4 days and up to 3–4 weeks. Recovery begins within 2–4 weeks after the progression stops. While most patients recover, approximately 15%–20% experience persistent symptoms. GBS is fatal in 5% of cases.