The contraction of infectious diseases can be avoided by practicing good avoiding contact with and boosting your immune system with immunizations.

hygeine, vectors.

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.

hello! my name is zalgo and i am here to be of assistance for you today! in most cases, it takes a while for little babies to learn things, but visual presentation (showing them what do to), some physical therapy (if you have seen funny videos on the internet of parents beating things to show the kids what not to do).

i hope that this ! : d

"stay and stay proud! " - zalgo