It is important to understand the importance of health.

He read the small print using a magnifying glass.

Hand washing and wearing masks are important for the prevention of severe acute respiratory syndrome.

He always seemed to be hiding something, always avoiding being seen.

He is using methods to avoid search engines so that his information does not get caught by them.

He is an expert in virology.

My computer got infected with a computer virus.

The Ebola virus is a very infectious virus.

The poliovirus is a virus that primarily enters the body through the mouth and destroys the nervous system.

Norovirus can be prevented by hand washing and disinfection.