A potent medicine capable of curing the body of disease. A relatively modern invention compared to the traditional potion or antidote, it enters the drinker's bloodstream to increase their immunity to a number of viruses and contagions. Not yet under mass production, it is nowhere to be found at provisioners, being the sole domain of aristocrats and high-ranking officials with the influence and coin to acquire it.
A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins.