Oh, your poor crew!
Wyatt has a bacterial infection secondary to the herpes. Sneezing with blood in it is due to the severe sinus inflammation as well. He needs Terramycin eye ointment, and systemic antibiotics. I would consider him at risk for chronic rhinitis/sinusitis problems, where his immune system is always attacking the nasal linings. I manage this with immunosuppressant drugs and antibiotics when the green and yellow stuff starts, as needed on a case by case basis when he's older.
The red/brown/black goop is tears. Whether they're producing more due to eye irritation or not cleaning themselves, you never know.
It sounds like you're practicing good isolation protocols with clothes changes, etc. I don't think the beard is doing it :)
In general, I always worry about FeLV and FIV, as those viruses destroy the immune system over time, making the kitties more susceptible to the "routine" upper resp diseases.
FIP, and the new virulent calici virus are what I would worry about with the acute illness/death kitties. Possibly panleukopenia (the kitty parvo virus) as well, as one kitty is vomiting.
Depending on the underlying cause, it is hard to say how to reduce transmission. Panleuk in particular is hard to kill, and you may have missed vomiting or diarrhea in outdoor kitties. FIP is an abnormal immune system reaction to the corona virus, which is included in the cat "distemper" vaccine, with panleuk, calici, and usually chylamidia.
Bleach, bleach, bleach, and don't reuse blankets or towels that were in with affected kitties for a while. With Wyatt, if they haven't tried clindamycin, azithromycin, etc, try those next. Clavamox is the first line treatment usually for oral meds. If you have dog crates available, isolate sick kitties in those. As for the colony...they're passing it out there, and I'm sorry I don't really have any great advice there. Those that have been exposed and fought it off will do fine.
If at all possible, it sounds harsh, but have the latest kitty that passes necropsied, so you know exactly what you're dealing with. Preventative measure can be better taken in that case, and disinfectants can vary between what viruses you're dealing with.
I wish you all the best of luck, and please reply if you think of other symptoms.
Dr. Chenoa
If you found my answers helpful, please remember to hit the Accept button. Feel free to contact me if you need more clarification.