Cynomolgus macaques - the unfortunate golden primate perfect for respiratory virus transmission studies. CoVid was found to be airborne long before the monkeys at the @CDCgov decided it might be.
Not going to bother with diarrhea, except to say Ebola virus has been found in stool samples, and toilet flushing has been amply studied and proven to generate infectious aerosols.
Moving on.
Next, is a study by Dr. @brosseau_lisa. She has forgotten more about airborne transmission than most will learn in 10 lifetimes.