Which of the following factors affect human health?

Grafting between two different species is known as:

Which of the following cells do not act as phagocytes?

Hashimoto's disease is a/an...

Antivenom injection contains preformed antibodies,while polio drops that are administered into the body contain:

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.