Which of the following does NOT typically classify as a communicable disease?

Asthma is classified as a non-communicable disease because it is primarily a chronic condition related to the immune system and respiratory health, rather than an infectious disease that can be spread from person to person. There are various factors, including genetic predisposition and environmental triggers, that contribute to asthma, but it is not caused by pathogens such as bacteria or viruses.

In contrast, measles, malaria, and flu are all examples of communicable diseases. They are caused by infectious agents that can be transmitted between individuals through various means, such as respiratory droplets or vectors like mosquitoes in the case of malaria. Recognizing the difference between communicable and non-communicable diseases is crucial for understanding public health measures and prevention strategies.