My new wheelchair is very comfortable.

This self-propelled lawnmower is very convenient.

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.

Our lives have changed significantly due to the impact of the coronavirus.

In the midst of the corona disaster, we learned a new lifestyle.

He is writing a paper about the event horizon.