The flu prevented him from playing golf.
A flu shot contains antibodies that fight the H1N1 virus.
We all caught flu, and so did the teacher.
My teacher has flu and hasn’t been at school all week.
He has a temperature and he aches all over. He has flu.
Bird flu is a viral illness that usually infects birds.
A lot of people at work have flu at the moment.
The pharmacist gave me some medicine for my flu.
If I considered the possibility of catching the flu every time I kiss a girl I don't know, I'd have no luck with the ladies at all.
When a new flu infects one human being, all are at risk.
A serious form of flu prevails throughout the country.
The flu struck the metropolitan area.
There's a lot of flu going around now.
Dan feels terrible. He thinks he has flu.