Why are deficiency diseases called non-communicable diseases?

Communicable diseases are those which can be spread from one person to another through contact through touch, sneezing, coughing, blood transfusion, etc. Non- communicable diseases cannot be transmitted in such ways. Deficiency diseases are merely caused due to deficiency of certain minerals or substances necessary for the body. Such diseases cannot be transmitted from person to person due to any reason. Hence, the are called non- communicable diseases.