Hello! Could you please tell me what to do, there’s a guy sitting next to me at work who eats garlic every day (he’s afraid of catching the flu). But it’s impossible to sit next to him. Should I tell...

Given them options:
Zinc, Air Shield (CVS version of Airborne), Green Tea (actual tea , I recommend Bigelow or capsules).
Vitamin C drops, Cayenne... Pepper (not a lot}. All of these can be taken every other or a few times a week). I believe that moving will cause tension. I agree that you do what's best for you. Especially, if its keeping you from doing your job well.
Or simple wash their hands rugularly. Also, if the feel like a cold is coming on, they should eat yogurt and something salty immediately. Or simply give them a bottle of garlic capsules.
If they are not willing to try some others options, then a car tree air freshener on you desk might help (smile). Seriously, if they are not willing to at least try, you have a bigger challenge than the smell of garlic. It's interesting that everyone is overly sensitive to the smallest misspoken word or joke socially, but not sensitive to those they interact with on a regular basis. more