Inoculation

Following the Yellow Fog epidemic, the researchers in Kealriv were still interested in how to prevent epidemics in the future and improving their treatment abilities. Dog kennels, particularly those that weren't well maintained or introduced new dogs without proper quarantine were prone to Canine Fire Joint Disease. They began studying it more closely due to the epidemic like spread. Leik Unstaldr moved to Ekkino following the epidemic and from his research on the Yellow Fog understood that organs and bodily fluids often contained the infection. He also knew that dogs that were infected with Canine Fire Joint Disease and survived often times wouldn't contract it a second time or had a much milder case. Suspecting the disease to be airborne, he worked on processing the infected tissues of dead and live dogs to create an effective powdered or gaseous form. While his early experiments are regarded as somewhat unethical, they were critical to understanding how the disease impacted the body and organs.
Eventually, he found a method to turn infected urine into a powder. The dogs who inhaled the powder developed a mild fever, diarrhea, and joint swelling, but they survived. When reintroduced to the general population of dogs, they only experienced very mild symptoms or none at all. They also didn't pass on the infection to other dogs once they'd been infected. Experiments continued on puppies, though he quickly realized that this preventative treatment only worked on dogs that were at least a year old.
Unstaldr continued his research and moved onto people. However, finding test subjects proved to be extremely difficult. He found that different fluids needed different forms of preparation. A local outbreak of Cow Warts which caused skin ulceration and pustules could have the infected fluid mixed with honey and reintroduced to healthy cows via scraping to protect them from contracting the disease. However, he also noticed that it took time for the treatment to work, and it didn't have an effect on already infected animals. This was purely preventative. Additionally, it only worked against the same disease, and it didn't seem to impact an animal's ability to contract other illnesses.
Much of his research unfortunately died with him, and inoculation remained a way to treat a few diseases in animals. It never made its way to being used on people, and Unstaldr died believing himself to be a failure. However, his process saved the lives of thousands of domesticated animals and has been widely practiced.