I can't solve this problem because there are too many numbers.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

That decision had a bad effect on our project.

His words had a great influence.

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.

My computer got infected with a computer virus.

He is an expert in virology.