By Anietie Anii-Bassey
Indian health authorities said Tuesday that they have contained a small outbreak of the deadly Nipah virus after confirming two cases in the eastern state of West Bengal, even as governments across Asia moved swiftly to tighten airport screenings and disease surveillance for travelers arriving from India.
The Health Ministry said the two infections were detected in December and that an aggressive containment campaign was launched immediately afterward.
Officials traced 196 people who had close contact with the patients, quarantined them and conducted laboratory testing. All of those contacts have since tested negative, the ministry said, adding that no further cases have been identified.
“The situation is under constant monitoring, and all necessary public health measures are in place,” the ministry said in a statement, while declining to disclose details about the patients or their current conditions.
Nipah is a rare but highly lethal zoonotic virus that was first identified during an outbreak in Malaysia in the late 1990s. It is known to spread from fruit bats and pigs to humans and can also be transmitted through close human-to-human contact, particularly in caregiving settings. There is no approved vaccine or antiviral treatment; doctors rely on supportive care to manage complications and stabilize patients.
The illness can cause severe fever, headaches, vomiting and respiratory distress, and in serious cases can lead to seizures, encephalitis and coma. The World Health Organization estimates that Nipah infections carry a fatality rate of between 40% and 75%, making it one of the most dangerous emerging infectious diseases.
Although no cases have been reported outside India in the current episode, the news prompted several Asian governments to adopt precautionary measures aimed at preventing potential cross-border spread.
Indonesia and Thailand announced heightened screening procedures at major international airports, including the use of health declaration forms, temperature checks and visual monitoring of passengers arriving from India.
Thailand’s Department of Disease Control said thermal scanners had been installed at arrival gates for direct flights from West Bengal at Bangkok’s Suvarnabhumi Airport, one of Southeast Asia’s busiest travel hubs.
Myanmar’s Health Ministry issued an advisory discouraging nonessential travel to West Bengal and urged anyone returning from the region to seek immediate medical attention if they develop symptoms within 14 days of arrival.
Officials said airport fever surveillance systems first rolled out during the COVID-19 pandemic have been intensified for flights from India, while laboratories have been placed on alert and stocks of medical supplies reviewed.
Vietnam also moved to bolster preparedness. The country’s Health Ministry importuned local authorities to reinforce monitoring at border crossings, health facilities and within communities, while emphasizing strict food safety practices as part of broader disease-prevention efforts, according to state media.
China said it was strengthening disease-prevention protocols in border regions and transportation hubs. Reports from state-run outlets said health authorities had begun formal risk assessments, increased testing capacity and stepped up training for medical personnel to ensure early detection and rapid response if any suspected cases emerge.
India has dealt with sporadic Nipah outbreaks over the past two decades. West Bengal recorded cases in 2001 and 2007, while more recent clusters have occurred in the southern state of Kerala.
A major outbreak there in 2018 claimed at least 17 lives and prompted sweeping public health interventions, including contact tracing and community lockdowns.
Officials in New Delhi said lessons learned from those earlier episodes have shaped their current response, including faster laboratory confirmation, tighter isolation protocols and rapid mobilization of public health teams.
For now, authorities maintain that the West Bengal outbreak has been brought under control, but they cautioned that vigilance remains essential given the virus’s high mortality rate and potential for person-to-person transmission.
Regional governments, meanwhile, appear determined to keep safeguards in place until they are confident the threat has fully passed.
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