Take it to a rodent vet. Or you could call or drop in to your nearest vet, and might get some help on medication or healthy eating tips for your rat. I have had a sick rat before and got some very helpful advice from my daily vet. Unfourtunetly it can be fateful but there is always a big chance of survival! Hopefull my help helped you about your sick or injured rat.
I'll assume you mean sick.
A sick rat should go to the vet. Most veterinary hospitals do not treat rats, however, so be sure to call ahead and find out if they have an exotics vet at the clinic you are calling.
A few good rules of thumb about visiting a vet for your rat - they should be comfortable handling your rat. They should be familiar with the different medications used for rats (ie. baytril, doxycycline, enrofloxacin, vibramycin, amoxicillin, cephalexin, azithromycin, clavamox, gentacin, gentamycin, metacam, etc).
Most rat illnesses can be treated with a course of antibiotics, typically given for 2-3 weeks, twice a day. It depends on the illness for what medication is prescribed.
A good source of rat health can be found in the related link.
You call them a veterinarian
a dog
a patient
Do you mean when you call on the phone? Of course not; that makes no sense at all.
=== === ---- === === this site is a bit vague
yes the animals can get sick but the humans (us) cant
either call animal control and they will take it or take it to the vet
doctors
A person who helps sick people is typically called a healthcare professional. This includes a range of roles such as doctors, nurses, and therapists, all of whom provide care and support to patients. More broadly, the term "caregiver" can also refer to individuals who assist those who are ill or in need of help.
If he or she is sick,then the parish would call a priest to anoint him and pray for him for his healing.
It depends on the level of formality. I think invalid is somewhat of an outdated term, more so constained to literature and other written text nowadays. However, depending on the context, I think it would not be impolilte as much as passé to call someone a sick person an invalid. (If you are looking for a word to substitute for the phrase 'a sick person,' though, invalid is probably the best word that exists) Hope this helps!
Possibly but unlikely. Few viruses are transmitted between species. When it happens it is usually the other way around.