Perhaps most compelling, though, is that tattoo techniques could prove useful for interacting with our immune system more directly. Presently, most vaccines are injected deep into the muscle.

A team at the Massachusetts Institute of Technology may be providing a solution – they’ve developed a safe ink to be embedded into the skin alongside the vaccine, only visible under a special ...

Are tattoos ultimately good or bad for you ... to reconsider how vaccines are administered. Currently, vaccines are injected into muscles that "aren't well stocked with immune cells," Wu writes ...