You can read the exact guidelines here: https://apps.who.int/iris/bitstream/handle/10665/163636/WHO_...
In particular, they say:
Disease names may NOT include: [...]
- People's names [...]
- Cultural, population, industry or occupational references. Examples: Occupational, legionnaires, miners, butchers, cooks, nurses
What it again does not mention is brands.
You can read the exact guidelines here: https://apps.who.int/iris/bitstream/handle/10665/163636/WHO_...
In particular, they say:
Disease names may NOT include: [...]
- People's names [...]
- Cultural, population, industry or occupational references. Examples: Occupational, legionnaires, miners, butchers, cooks, nurses
What it again does not mention is brands.