swine flu vaccine patch?

I read today that the swine flu vaccine used in Australia is multi-dose needle injection, which in itself presents problems such as transfer of bacteria between patients and the need for additional chemicals (comprising Mercury) as preservatives. I'm wondering if the OBJ patch could be used for the swine flu vaccine? Perhaps it is early days but at least it wouldn't have these problems... or it might introduce new ones... I don't know.

Where there is a will there is a way!!