All kids are going to take the influence vaccine because it is coming winter.
This is how the vaccine works
Timmy is waiting for the vaccine, is very scared, but the receptionist told him that he don't need to be scared.
After they eradicate the influence antigens
Timmy is now being vaccinated
Now Timmy has develop immune memory to influenza virus
The vaccine enters the body and drops influence antigens
Antigens foment the production of memory, when the eradicate them the organism creates memory cells for another attack.
Now when influenza attack's Timmy again the memory cells from the third barrier will activate and liberate antibodies that will make easier to defeat influenza.