No one has done it so here's the complete write up.
To request the task you need 1 person who has done the The Bubonians Are Coming! from Jerom Bertrand.
Once you have the task the trigger is "Show me" to Jerom Bertrand, to get in. If you zone out you will need to run to the village and talk to him again to get back in.
The queen spawns in the small room furthest south in the zone. The room prior to it has a bunch of trash, there are only 3 mobs in the room with queen, 2 trash and the a plague spirit.
Clear the trash and pick a spot for her. Keep in mind that there is mezzing going on during this so LoS is important, also the further away you pull her the longer it takes her to move to. While she's moving her timer is running, so she can spawn the first wave of maggot and her a/e on the pull, once she casts her a/e she will summon.
6 Maggots spawn every 60 seconds.
She a/es for 18k every 60 seconds. She will emote the a/e 10 seconds prior to casting, you can run out of it if you wish. "Queen Malarian anchors her feet to the ground and prepares to unleash a wave of burning acid."
Every 70 seconds she emotes a single player "Queen Malarian begins to exude diseased fluids and takes careful aim at aplayer01!" The entire raid sees this.
The emoted player also receives text "You see the queen glare at you, aiming her sickening ball of fluids at you."
The player in the emote has 10 seconds to move away before she casts. While it's called a viral it's not, it's a targeted a/e, range 30. Pick a spot about 100 range away and mark it somehow (Guild banner works) That is where the emoted people should run. Have someone with Cure corruption rank 3 (tss runes, druid or shaman) on curing. There are other cures but I think that's the only single target castable on anyone.
The spell isn't cast for 10 seconds, so curing prior to it landing doesn't help. Duh. Lots screw that up. It has to land before it can be cured. 7 or more seconds after it lands on the person it will spawn a fly. Each person that has it spawns one. So if you have a stupid person who doesn't move to the spot, or doesn't move fast enough, you're in trouble.
Throughout the fight "a plague spirit" will roam the area, it has 2 auras, 1 is blind, the other is silence. Moving away from it will remove the effects.
Pull queen and engage. We just fight through the a/e and heal for it. As emoted people get called they run to the cure spot and get cured.
Enchanters use PB a/e mezzes and lock down the maggots. They don't hit for much but they regularly stun casters and that can be very bad. No one should engage maggots unless absolutely needed. Once they lock aggro they stay there till dead. They have about 50k hp so a wiz or two can time it to kill pesky ones (locked on a healer and missing the mezzes) easily. Maggots will also shield the queen. When a maggot gets low on health they will cast Slithering Infection. This is the single version of the targeted a/e. The text is: "You are infested by a devouring maggot." This needs to be cured in 7 seconds as well or it spawns a fly.
Burn queen. One tank can handle her the entire fight usually unless she gets lucky with the 18k + a quad, her melee dps isn't that great.
The maggots do despawn over time but it takes a while, easier to just keep mezzing them and killing, they won't spawn flys once the event is over. Flies do not despawn. The chest spawns in her room.