Indaria has no sympathy to either of these complaints.
Although her Captain is quite devout, Indaria doesn't participate in traditional services, and doesn't consider herself welcome to them in the first place. Others being put in the situation she lives every day really does not bother her in the slightest, and as far as she's concerned that message never reached her. oops?
As for the, more reasonable but still unimpressive, complaint of the overworked medbay, that wouldn't be a problem in the first place if those minor medical needs had been addressed in a timely manner. If it really is as bad as they said, then the procedure could be changed to provide immediate relief, but there would need to be an inquiry into why the needs of the people they're supposed to care for have been overlooked up until now, aka: "So what you're saying you haven't been doing your job properly and it's coming back to bite you?" Alternately if it isn't actually that bad, then there's no need to change things now is there? She's fine letting them pick which option they prefer. Especially since she suspects that the real reason these people have so many minor needs that are only now being addressed is because they're mutants, like her, and their needs were being actively ignored. Other mutants getting proper medical care for once really doesn't bother her one bit.
However, finding out that it's a plague of undeath amoungst the voidsmen, things change. Fast. Armsmen are to be mobilized, and large cargo rooms cleared out with additional rooms adjacent to them also cleared. The armsmen are to be masked up, and the mission is to evacuate the voidsmen from the threatened and infected quarters area and move them to opened up cargo spaces. Once they've evacuated the voidsmen to the cargo rooms, the armsmen themselves will be quartered in the adjacent rooms, and are to assume that every single evacuated person as well as they themselves are infected, and supplies will need to be delivered to them, but since there's a chance their precautions will work they'll be kept separate from their charges. If the evacuated voidsmen attempt to contact the rest of the ship, the armsmen assigned to them must stop them. If anyone dies, they are to be cremated on the spot. Issue flamers, incendiary devices, and promethium, to every unit of armsmen for this purpose.
Also: get clarity on the report of the dead rising up. Was it only the voidsmen that become undead? Are the mutants unaffected?
Medical is getting an armsmen squad assigned to it 24/7, and anyone in critical care will have their treatment overseen by an armsman with the express purpose of making sure that if someone dies, they don't harm our medicae.
One of the nice things about having people compartmentalized like this, the hallways will be generally empty. It should be easy to get moving fast on this. and frankly, plague of undeath is a nice relief. For once, the disease IS something she can shoot. lets get to it! Full military, weapons hot, time to show what we can do.
Though, she is now much more willing to relax her earlier quarentine requirements. They remain in-place, but exceptions can be made as needed, and the request for people to bring even minor issues to the medicae, now that we have samples of what the disease is and does, can be removed.
According to all survivor reports mutants where the first to rise. Given the state of panic the survivors where in when explaining the story it is unlikely that there was any collaboration between them and this is almost certainly the truth.
Armsmen begin blocking the halls and evacuating as many Voidsmen as they can. The cargo bays are soon filled with evacuees, with the officers finding any additional rooms to fit more warm bodies. The scale of this operation makes it hard to keep under wraps. Hundreds had died in the infirmary, the horde soon expanding into thousands while tens of thousands need to be evacuated and supplied. Thus the armsmen find themselves in prolonged combat with the dead, unable to quarantine themselves or remove themselves from their positions without allowing the army of undead to have free reign of the ship.
The Ark Royal's armory also proves to be severely lacking in the flame-based weapons of your home planet. Her armsmen are mostly equipped with shotguns and shields, a loadout crafted specifically to do as little unintended damage to ship parts as possible. Flamers, being weapons most noted for doing large amounts of unintended damage, are completely absent. Still many of the more experienced men know how to set fire to other people's ships and on your orders prepare improvised incendiaries with ship fuel and alcohol.
Day 3: Armsmen blockade and evacuate the voidsmen quarters. Twice killed undead appear to have a variety of mold filling up their body, especially their brains. Undead have increased physical strength and reliance compared to living voidsmen. A large enough group is capable of physically tearing down barricades. More sturdy blockades, such as bulkheads, are being covered with mold that is steadily reducing structural integrity when near a horde.
****
That disease wouldn't have even been noticed on an eldar ship, since the crew dying in droves wouldn't be a regular occurrence. But these short-lived and volatile creatures have the potential to let it spread and spread.
Perhaps it's for the best if the curses of chaos are adjusted to prey on the weak. They adapt to the dominant species and become weaker for it.
Day 3 of the disease happens to coincide with day 9 of the trip, meaning a new Trial alongside the disease.
You see a pair of rooms. The left room is a Cathedral in the Imperial style with golden angels wielding flaming swords flying around chanting prayers to the Emperor. If this path is taken, the angels will appear in the dreams of the crew attempting to get them to let them in. If successful they will either attempt to purge the unclean from the ship (which will likely include the undead infestation, and also maybe probably you) or murder everyone on the ship (assuming this form is a ruse to trick the ever gullible humans). In the right room is a casino. Daemons will contact important crew members and offer them a game of chance. Win and you get a boon or power, lose and the Deamon claims a portion of your soul. This will extend to all retinue and some NPCs, opening up the possibility for corruption to take root on the ship.