Colds are contagious. ✬

Enthusiasm is contagious. ✬

You're contagious. ✬

Is it contagious? ✬

Typhus is a contagious disease. ✬

I'm contagious. ✬

Tom has a contagious disease. ✬

The doctor told us that what Tom has isn't contagious. ✬

The doctor said that what Tom has isn't contagious. ✬

Tom's enthusiasm is contagious. ✬