I got a flu shot today 
The flu is already going around here
I don’t really want to get the flu.
My older sister has never been getting a shot and flu.
She is an elementary school teacher though.
She told me “ my mind controls my health “.
I know but I’m worried that I can’t take a long days off if I get the flu.
And I don’t want to give elderly it 
By the way, it costs ¥2000.
But it would be around ¥3500, if I get the shot at another clinic.
Why is it so different?
How much is the purchase price??