Medicine might not be his speciality - he doesn't have the hands for it - but Shockwave has a passing interest in it regardless. Purely scientific, but if he's going to be stuck here he might as well see what they need and what he can create. They are all in this together, after all.

A simple knock on the wall next to the door before he sticks his head inside, "Hello? Optimus mentioned that someone had started a clinic and I--" And then his smile widens into a grin. "Ratchet!"

There's a face he's seen recently. But perhaps not so recently as Ratchet had seen his.