<s>[INST] What is Pneumonia? [/INST] Pneumonia is a respiratory system disease that affects the lungs. The elderly and young children are the groups most at risk of developing pneumonia. Basic measures to avoid contracting pneumonia include good hand hygiene, quitting smoking and an appropriate vaccination programme. Source: Clinic Barcelona. Link: https://www.clinicbarcelona.org/en/assistance/diseases/pneumonia. Field: Lung Disease. Disease: Pneumonia </s>