I agree with Kenjhee. Transmission by eating something would be extremely rare. Plus, a rabid squirrel would be to dysfunctional to survey a table of food. Rabies causes strange behavior.

Plus, any virus would be destroyed by your stomach acid.

My bigger concern is that you need some help with obsessive thoughts. I know what they can be like because I suffer from looping thoughts. Fortunately, mine are rarely worrisome, more just annoying and a nuisance.

Speaking to a specialist would be worthwhile so you can be prepared if you get overwhelmed. If you can find a psychiatrist who has experience with obsessive thoughts and especially PCS, you should be able to get control of this. A combination of CBT and meds can be very helpful.

My best to you.