There's a chrrrmmmm noise from behind. Mia may notice that she's suddenly starting to feel a lot better. If she turns and looks behind her, she'll find that Medic's stepped away from the cart and is pointing the nozzle of that big blue backpack he always wears at her. The swirling blue energies it emits don't seem much concerned with traveling in a straight line, but the link is there- and will stay there until she's not only healed, but rather better than healed. A freshly pumped-up Pyro will definitely make RED's day that much worse.