A deadly outbreak of Nipah virus has killed 10 people and left two people in critical condition in the southern Indian state of Kerala. The virus, passed along by fruit bats, pigs, or through human contact, causes debilitating fevers, convulsions, and vomiting. It has no cure, no vaccination, and kills about 75 percent of people affected by it. The disease’s quick fatality rate and contagiousness have gripped the area, with patients being placed in isolation. Public health officials have repeatedly declared that the situation is under control. Previous outbreaks were in Malaysia and Bangladesh.