If a business has 60 percent of its employees who are sick, how are they going to keep operating? If schools have a lot of children who are sick, how are they going to keep operating? Are they going to have to close? Are their children going to have to be at home?
Flu is a virus that most people have no immunity or build-up to. It could spread worldwide and become a pandemic in 4 to 6 weeks.
We don't want to create a panic, and the education process is for everyone.