Dude. Get your brother ivermectin or Fenbendazole as quick as possible.
Both are availible in the pet store for dog, cats, birds, horses
There are brain eating parasites on the test swabs
https://www.popsci.com/science/article/2013-08/parasites-want-invade-your-brain/
Then show him this. According to medical science papers ivermectrin has 4 different anti virus mechanism
Getting rid of parasites is a bonus for a covid scared person
Right. Need to dose right, and be fast, before multi generation egg laying.
I named ivermectin and Fenbendazole because there are many papers that those 2 help vs many cancers also.
You could be right with the possible ascaris parasite
https://en.wikipedia.org/wiki/Ascariasis
The right minerals, and vitamins also helps
https://candidaspecialists.com/parasite-cleanse/?data1=parasite-symptoms#parasite_cleanse_diet