Most likely cats and dogs
Galen was a renew physician during the Middle Ages and Hippocrates believe that there are four humor in the body that which brings balance for a healthy life
Blood
Yellow bile
Black bile
Phlegm
Flu is primarily treated with rest and fluid intake to allow the body to fight the infection on its own. Paracetamol may help cure the symptoms but NSAIDs should be avoided. An annual vaccine can help prevent the flu and limit its complications.
Vet tech assistant obtain and record patient case history, collect specimens, and perform lab procedures/equipment for surgery.