Lingering Malady is a World Quest available in Mondstadt in Genshin Impact after you reach a certain Adventure Rank.
Your task is to help Aramis find the posters and billboards on the rooftops in Mondstadt.
Here’s a walkthrough of Lingering Malady in Genshin Impact.
To begin the quest, talk to Aramis who is near the Cathedral. The location is shown in the map below, marked by the player location.
You will see him standing in front of the Cathedral’s steps.
How to find the posters and billboards
There are four different locations for the posters and billboards.
The first one is located on the city wall, above the side entrance to Mondstadt. It’s the one behind the tavern. You will find a Merchant Billboard here.
You will find the second on the rooftop above the Alchemy and General Goods building. It’s a Merchant Poster.
For the third, go to the area marked on the map below, within the red circle.
You will see a Merchant Poster on the rooftop.
For the fourth, go to the area marked within the red circle, near the Knights of Favonius’ Headquarters.
You will find a Merchant Poster here. You can actually see the Knights’ headquarters from this rooftop.
Return to Aramis
After finding all four, go back to Aramis to complete the quest.