Airports across parts of Asia have reintroduced enhanced health screening procedures after confirmed cases of the Nipah virus were reported in India, raising regional concerns about the possible international spread of the disease.
According to Indian health authorities, five infections were recently identified in West Bengal, a state in eastern India. The cases were detected among healthcare workers, prompting officials to reassure the public that containment measures are in place and the situation remains under control.
In response to the developments, Thailand, Nepal and Taiwan have reinstated airport health checks similar to those adopted during the Covid-19 pandemic. These measures include traveller screening, health declarations and increased monitoring at international terminals, particularly for passengers arriving from affected regions.
Meanwhile, health authorities in China stated that no cases of Nipah virus infection have been identified within the country to date. However, officials acknowledged the ongoing risk of imported cases due to regional travel, underlining the importance of vigilance and early detection at points of entry.
A recurring zoonotic threat in South and Southeast Asia
The Nipah virus is not a new pathogen in the region. The World Health Organization (WHO) reports that the virus was first identified in Malaysia in 1999 during an outbreak linked to pig farming. Since then, sporadic outbreaks have occurred, particularly in Bangladesh and India, where the virus is detected with relative frequency.
Nipah is classified as a zoonotic virus, meaning it can be transmitted from animals to humans. Fruit bats of the Pteropus genus are considered the natural reservoir. Human infection can occur through direct contact with infected animals, consumption of contaminated food, or through person-to-person transmission, especially in healthcare settings.
Scientific studies published in peer-reviewed journals such as The Lancet Infectious Diseases and Emerging Infectious Diseases highlight that Nipah virus infections can cause severe respiratory illness and encephalitis, with reported fatality rates ranging from 40% to 75%, depending on the outbreak and healthcare response.
Regional preparedness and global health surveillance
Public health experts stress that early detection and cross-border cooperation are essential to prevent wider transmission. The reintroduction of airport screening in several Asian countries reflects lessons learned during previous global health emergencies, particularly the Covid-19 pandemic.
The WHO continues to list the Nipah virus as a priority pathogen due to its epidemic potential and the absence of a specific treatment or licensed vaccine. Current management relies on supportive care, infection control measures and rapid epidemiological surveillance.
As international travel remains high across Asia, health authorities emphasise that transparent communication, robust monitoring systems and rapid response protocols are critical to safeguarding public health and preventing future outbreaks from escalating beyond national borders.