“These bits of skin contain a protein called FelD1 that is responsible for the allergic reaction. FelD1 is found in a cat’s urine, sebaceous glands, and saliva. When a cat licks their body, the protein attaches itself and dries, and when the dander flakes off, the allergen becomes airborne.”
So a protein called FelD1 (Felis domesticus allergen I) is the problem for people who are allergic to cats. Some cats have less of this protein, but that’s a whole other topic.
What can you do? Avoid or minimize contact with FelD1.
Don’t let your cat on the bed.
Don’t rub your face and hands against your cat’s body, unless you’re going to wash afterwards.
Keep a clean house.
Don’t keep the litter box in an area where you spend a lot of time. Don’t use a dusty litter. Keep the litter box scooped.
Bare floors are better than carpeting. Don’t choose upholstered furniture.
Bathing and brushing at least once a week. If you can’t bathe your cat, wipe your cat down with a hypo-allergenic pet wipe or a wet washcloth as often as you can. You have to do it at least once a week. For real. See below for study.
My opinion is that shampooing is going to be more effective at decreasing dander than just soaking a cat in water. Why? Shampooing makes cats less oily. Allergens stick to oil. How do I come to that conclusion? Everything sticks to oil. I don’t need a study to prove this:)
I’m better at shampooing than most owners, so what makes sense is to schedule a bath once a month or as often as you can, while wiping the cat down as often as you can.