Why do i suffer symptoms of self allergic to cats, when i haven't formerly?

Our family owned this one cat my whole life til it died nearer this year. Symptoms never arose, but i do have asthma but i never felt like here was ever a difficulty breathing or sneezing when i was around her. Recently we took in a stray for a daylight and that was the first i noticed runny/stuffy nose and puffy eyes around a cat. The excuse be that it was a long hair as apposed to the old cat whom be a short hair plus it could have been carrying pollen or dirt within its fur. just yesterday we adopted a cat from a shelter, short fur and i was again suffering these allergenic symptoms.


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