To prevent a cold, let's take a lot of vitamin C.

This disease is highly contagious.

This cold is very contagious, so please be careful not to spread it to others.

We need to review the whole plan.

Looking at it as a whole, his plan is likely to succeed.

The nurse gave the patient medicine.

He decided to descend from the mountain because he got altitude sickness.

We should take responsibility as part of society.

I am planning to get immunized tomorrow.

His words had a great influence.