Rare Infectious diseases

Rare infectious diseases are caused by external factors like genetically or through the environment. Rare disease affects a small percentage of the world population. Whose rarity means that there is a lack of a market giant enough to realize support and resources for locating treatments for it, except by the govt granting economically advantageous conditions to making and mercantilism such treatments. Some of the rare diseases are rat-bite fever, seal pox, scarlet fever, meningococcal diseases, and bubonic plague.