Why is it necessary to develop new generations of antimicrobial

Why is it necessary to develop new generations of antimicrobial medications?

http://nursingmodules.com/wp-content/uploads/2020/02/logo-300x60.png 0 0 prince http://nursingmodules.com/wp-content/uploads/2020/02/logo-300x60.png prince2021-01-31 07:24:082021-01-31 07:24:08Why is it necessary to develop new generations of antimicrobial