Many Asian countries have tightened airport screening following a Nipah virus outbreak in West Bengal, India. "All traced contacts have been found asymptomatic and have tested negative for Nipah Virus Disease," according to the statement released by India's Ministry of Healthy, per 9news. The concern over the Nipah virus has led to tighter airport screening measures in Asian countries such as Thailand, Nepal, and Taiwan, as reported by the BBC. Understanding What the Nipah Virus IsThe World Health Organization (WHO) defines the Nipah virus as a zoonotic virus, which means that it is transmitted from animals to humans. As of press time, there is no confirmed case in Australia, and the country remains free of the Nipah virus.