<s>[INST] Is pneumonia contagious? [/INST] Pneumonia is usually only contagious in some specific cases, for example if it is caused by the flu virus (influenza virus) or by certain bacteria, such as Mycoplasma pneumoniae pneumonia. The risk of transmission is very low; nevertheless, some basic preventive measures such as washing your hands are still recommendable. Source: Clinic Barcelona. Link: https://www.clinicbarcelona.org/en/assistance/diseases/pneumonia. Field: Lung Disease. Disease: Pneumonia </s>