what is the benefit of keeping the immune system strong?\n\na strong immune system will completely prevent…

Brief Explanations:

The immune system is the body's primary defense mechanism against pathogenic microorganisms such as bacteria, viruses, and fungi. While it cannot "completely prevent" all illnesses (as some pathogens can bypass defenses) and does not eliminate the need for hygiene (which reduces the initial pathogen load), its primary function is to identify, attack, and ward off infections to maintain health.

Answer:

A strong immune system wards off infection.