People with asthma should avoid alcohol and limit frozen and canned foods to prevent acute asthma attacks.

I recently had a general health check-up and a chest X-ray revealed lung calcifications. What is this condition, and is it dangerous? (Nguyen Thi Minh, Thanh Hoa)

My son has a persistent cough, but no fever and hasn't lost his appetite. The doctor diagnosed him with whooping cough, but medication hasn't helped. Is this condition dangerous? (Tran Thi Hoa, 28, Hanoi)