Is the patient dead is the patient dead is the patient dead- he can probably help but only if they aren't dead- medical professionals manifesting slime powers is a much less concerning circumstance when they aren't potentially killing people at that very moment- not a very helpful train of thought- he's just going to obligingly step back and do his best not to seem upset. What would Sandy do- okay, he should probably not do what Sandy would do- what would Marcus do- try to calm him down, first.
"Sir, there've been a number of incidents of this type- sudden outbreaks of unusual quantities of exceedingly unusual materials- throughout the city, though this one seems unique in execution. I have what should function as a cure to any of its deleterious effects, provided it isn't instantly fatal; since it clearly isn't immediately fatal via gaseous exposure, I should be fine for now. A quarantine isn't necessary at this time- please remain calm. Your patient seems to be experiencing more of a reaction to the fungus than you are; if you could, um, drag them to the door so that I may administer the involved restorative, I would be much obliged."