Explain any three preventive measures to control microbial infections.

(N/A) Maintenance of personal and public hygiene is very important for the prevention and control of many infectious diseases.
$1$. Personal Hygiene: This includes keeping the body clean,and the consumption of clean drinking water,food,vegetables,and fruits.
$2$. Public Hygiene: This includes the proper disposal of waste and excreta,periodic cleaning and disinfection of water reservoirs,pools,household coolers,and tanks,and observing standard practices of hygiene in public catering.
$3$. Vector Control: For diseases like malaria and filariasis transmitted by insect vectors,it is crucial to eliminate breeding grounds. This is achieved by avoiding water stagnation,using mosquito nets,introducing larvivorous fish like $Gambusia$ in ponds,and spraying insecticides in drainage areas.