What is the condition of some parts of the body that interferes with their normal functions called?

What should be used for the maintenance of personal health?

Which of the following statements are correct?
$(1)$ Yoga is practiced to achieve physical and mental health.
$(2)$ Infectious diseases are very common; all of us have suffered from one or the other at some time.
$(3)$ $AIDS$ is an infectious disease.
$(4)$ Cancer is a non-infectious disease.
$(5)$ $A$ healthy person contributes to economic prosperity.

Which of the following is an example of a physiological barrier in the human body?

Which of the following is not an antibiotic?

Biological pathogens include which of the following?