Answer:
hygeine, vectors.
Step-by-step explanation:
Disease causes the uncomfortable functioning of the organs of the body and disturbs the human physiology. Two main types of diseases are known as infectious and non infectious disease.
The infectious disease might spread in the unhygienic condition. The individual should maintains the hygiene condition and reduces the environmental condition that might increases the infectious disease. Some diseases requires vector for its transmission. The vector must be killed to prevent the chance of the infectious disease.
Thus, the answer is hygeine and vectors.