You have some questions that should be directed to a vet.
Cats are interesting animals. One specific virus that in a cat causes pneumonia, for example, causes leukemia in humans. This is not to say that cats carry this or a leukemia danger. The point is that the same organism in a cat's bloodstream may produce an entirely different effect in a human.
The other problem is that cats like to play with dead things, and dead things harbor all sports of infectious organisms. And these bad creatures tend to end up on the cats paws or claws.
Needless to say i ended up having a major allergy that was same symptoms of cat scratch fever. I found out i woke up from a deep sleep and my felines behind was close to my head, but no animalistic behavoir. I still have ringing in my ears and starting to feel some of the symptoms again. Fatigue, drainage, and scratchy throat. I never experianced an aweful condition with a possible virus before like i did in the past. It felt horrific and mentally draining. I think i was just trying to find an answer to why i felt as crappy as i did. So, i blamed it on an animal. I recently had a lady where i work make a comment she was going to get rid of her animal, because she thinks that is why she was having problems with a urinary tract infection? That was interesting to hear. Looks as if i am not the only one.
Water behind the ears or something, past heavy chest breathing, feels like lump in throat, past deep congestion, mucus back up, nose drainage. Feels like rice crispy pops in my head or ears on top of my head and side headaches with pressure. Throat feels like it is in dormant with on/off flare ups. Could it be a parasite in the brain. No medication has worked if it is a deep congestion issue.