Medic Special Infected

So I got this idea once for a whole bunch of new Left 4 Dead Special Infected based on the classes of Team Fortress 2.

Here's the first one, The Medic.

"The Medic is one of the most disturbing kinds of Special infected. The strain of infection that creates Medics causes the infected to recognize and react strongly to the red cross symbol, and they adorn themselves with these, as well as dress themselves in white lab coats, possibly to fool their prey. This is also evident in their manner of approaching their prey. Medics are drawn to the cries of the wounded and the smell of blood, and slowly approach their prey with a calm and assuring demeanor, as if to say "Don't worry, I mean you no harm".
Their right hands and wrists grow long bony spikes, like "teeth", turning the arm into a sort of "bone saw". This is hidden behind the Medic's back when approaching the prey, and is then used to grab on to the victim, while the Medic apparently sucks their blood, in the manner of a vampire; a way of feeding not found in any other type of infected so far. Their grim appendage is then used to slowly disembowel and dismember the remains of their meal, and eyewitnesses have reported that a Medic in the middle of doing so is completely absorbed by it, as if he is investigating the contents of the body with a strong sense of curiosity and wonder.
Medics are also known to possess an accelerated rate of healing, so a Medic that is wounded and allowed to run away (which they do well) will soon return at full strength.
Medics are also known to lie in ambush in the area near first-aid kits or a safe house, since these objects and places are marked with the red cross symbol. One should therefore not be too positive and let one's guard down when finding them. "