Humans can be sensitive to a different number of allergens that when summed all together present an additive effect called the “total allergen load”. When an individual has increased exposure to a single allergen or a sum of different allergens and their allergen-threshold is exceeded, a sensitivity reaction may be triggered.
Human allergists often recommend for cat allergen-sensitive owners to avoid or reduce the allergen contact—which means constant house cleaning, bathing the cat, or medications that ease symptoms for people with cat allergen sensitivity.
There is a common belief that some breeds of cats, especially hairless breeds, are ‘hypoallergenic’. The popular belief is that ‘hypoallergenic’ means ‘allergen-free’ – but what it technically means is ‘less’ allergenic.