(adj) connected with something

(n) a disease that many people in a place have at the same time

(n) a living thing that is too small to see but that makes you sick

(n) something that shows that you have an illness

(v) to give a disease to someone

(v) to grow slowly, increase, or change into something else

(adv) about; not exactly

(v) to put something on or in front of something else to protect it

(adj) very bad

You should always _ your mouth when you sneeze to prevent spreading germs.

If you don't rest, your cold might _ into something more serious.

During the flu _, many people stayed home to avoid getting sick.

The number of people at the event was _ 100.

One common _ of the flu is a high fever.

The flu can be _ dangerous for elderly people and those with weak immune system.

The flu can _ people who are in close contact with someone who is already sick.

The symptoms of the flu are often _ those of the common cold.

The flu is caused by a _ that spreads easily from person to person.

People with _ flu may experience high fever, body aches, and difficulty breathing.