it appears that this flu is not very dangerous to most healthy people (some don't even notice when they get it), but can be very deadly for certain groups (pregnant women, small children among others). It can also easily spread from person to person. Some of the people in the risk groups cannot be vaccinated because of allergies, immune system deficiencies, etc.
The vaccination drives are pushed by almost all governments in order to prevent this flu from spreading to people in the risk groups.
People who choose not to take the vaccine should therefore immediately go and stay at home when they have flu like symptoms.