Biohazard

Biohazard continues the storyline after the Plague City quest. The plot deepens as Elena finally gets a chance to process her plague samples. Buried under these samples lies a well-hidden secret.

Details

Start point	Talk to Elena in her house in East Ardougne.
Difficulty	Novice
Length	Short
Requirements	Completion of Plague City.
Items required	Gas mask (Can be obtained during the quest)
Recommended	10 Combat level Stamina or energy potions
Enemies to defeat	None

Video walkthrough

Walkthrough

Sneaking back

Elena's location

Items required: Gas mask

1. To begin talk to Elena in East Ardougne.
2. Talk to Jerico in the house just south of the northern Ardougne bank to retrieve Elena's distillator.
3. Talk to Omart just south-west of Ardougne Castle.
4. Go back to Jerico and inform him about the guards.
5. Talk to Omart again, afterwards climb over the wall and equip your Gas mask.

Infiltrating the Mourner Headquarters

Items required: None

1. Investigate the headquarters in West Ardougne.
2. Poison the cauldron with a rotten apple outside of the building.
3. Go to Nurse Sarah's house, south-west of the West Ardougne church and search the cupboard to obtain a medical gown.
4. Go to the most north-eastern building and head up to the second floor to obtain Elena's Distillator.
5. Return to Elena and collect the plague sample.

Getting the scratchpaper

1. Head over to Rimmington and talk to the Chemist who is located in a building south-west of the Rimmington house portal. He will hand you over the scratchpaper. (Do not mention anything about the plague)

Foresight

1. Talk to Hops outside of the building and give him your vials.

So far, so good

1. Meet Hops at the Dancing Donkey Inn which is located in Varrock, somewhere near Aubury's shop.

Secrets

1. Head south-east of the Dancing Donkey Inn and talk to Guidor to hand over your plague sample.
2. Return to Elena to inform her the plague is false.
3. Finally, go to King Roald to inform him that the plague is false. He's located on the second floor of Ardougne Castle

Rewards

• 3 Quest points
• 100,000 Thieving experience
• 3 Muddy keys