Norovirus can be prevented by hand washing and disinfection.

My computer got infected with a computer virus.

He is an expert in virology.

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

He thinks that war is a necessary evil.

Do you understand the necessity of this project?

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

That information is unnecessary.

That information is completely unnecessary.

Due to the impact of the Wuhan virus, the whole world is in a difficult situation.