Peste des Petits Ruminants (PPR), also known as sheep and goat plague, is a highly contagious animal disease affecting small ruminants. Once introduced, the virus can infect up to 90 percent of an animal heard, and the disease kills anywhere from 30 to 70 percent of infected animals. The PPR virus does not infect humans.

PPR was first described in 1942 in Côte d'Ivoire. Since then the disease has spread to large regions in Africa, the Middle East and Asia. Today, more than 70 countries have confirmed PPR within their borders, and many countries are at risk of the disease being introduced. These regions are home to approximately 1.7 billion heads – roughly 80 percent – of the global population of sheep and goats.