Not to be outdone, Pancreanics, out of Boston's biotech hub, is training the islets of Langerhans to open your garage door.

WSJ: Email With Your Eyeballs, Change Channels With Your Spleen

The team suggest that specialised immune cells present in the skin called Langerhans may direct the body to respond positively to the vaccine.

BBC: NEWS | Health | Alzheimer's vaccine 'in a patch'

"Langerhans cell sarcoma is extremely rare, with only 40-50 reported cases in the literature, and only one other case of it arising from his particular type of leukaemia (acute lymphoblastic), " the spokesperson said.

BBC: Deryn Blackwell by Becky Williams