Nipah virus fears trigger airport checks across Asia after India confirms two cases

Airport health authorities wearing protective masks monitor passengers from international flights arriving at Suvarnabhumi International Airport in Bangkok on Sunday. | Suvarnabhumi Airport Office / via REUTERS

NEW DELHI/BANGKOK/SINGAPORE – 

Two cases of the deadly Nipah virus in India have prompted authorities in Thailand, Singapore, Hong Kong and Malaysia to step up airport screening in an effort to prevent the infection from spreading.

The virus, which is carried by fruit bats and animals such as pigs, can cause fever and brain inflammation ​and has a fatality rate of between 40% and 75%. Although it can spread from person to person, transmission is not easy and typically requires prolonged ‍contact with ⁠an infected individual.

It more commonly spreads to humans from infected bats, or fruit contaminated by them.

The infections were confirmed in ‍India in late December. Small-scale outbreaks are not unusual and virologists said the risk to the general population remained low. Several vaccines are in development but are still undergoing testing.

Fears of the deadly Nipah virus have triggered tighter airport health checks across several Asian countries after India confirmed two new cases in late December. Health authorities in Thailand, Singapore, Hong Kong and Malaysia have increased screening measures for passengers arriving from international destinations, particularly from India, in an effort to prevent the virus from spreading across borders.

At Suvarnabhumi International Airport in Bangkok, airport health officials wearing protective masks were seen monitoring passengers arriving on international flights on Sunday. Thermal scanners and visual health assessments are being used to identify travelers who may be showing symptoms such as fever or respiratory illness. Authorities say the measures are precautionary and designed to detect any potential cases early.

The two infections were confirmed in India, prompting contact tracing efforts and heightened surveillance in affected areas. Officials in New Delhi stated that small-scale outbreaks of Nipah virus are not uncommon in certain regions of the country, especially where contact between humans and fruit bats is more frequent. They also emphasized that the current risk to the general population remains low.

Nipah virus is a zoonotic disease, meaning it spreads from animals to humans. It is primarily carried by fruit bats, also known as flying foxes, which are the natural hosts of the virus. The infection can also be transmitted through animals such as pigs. In many previous outbreaks, humans became infected after consuming fruit contaminated by infected bats or coming into close contact with infected animals.

Although Nipah virus can spread from person to person, health experts say transmission is not easy. It typically requires prolonged and close contact with an infected individual, such as caring for a sick family member without proper protective equipment. This makes widespread community transmission less likely compared to highly contagious respiratory viruses.

The symptoms of Nipah virus infection can range from mild to severe. Early signs often include fever, headache, dizziness, nausea and vomiting. In more serious cases, the virus can cause acute respiratory distress and encephalitis, which is inflammation of the brain. Patients with severe infections may experience confusion, seizures and even coma. The fatality rate is particularly alarming, ranging between 40% and 75%, depending on the outbreak and the availability of advanced medical care.

Because of the high fatality rate, neighboring countries have responded quickly. In Singapore, health authorities have enhanced border screening and issued public health advisories. In Hong Kong and across Malaysia, airport officials are closely observing passengers arriving from affected regions and advising travelers to report any symptoms immediately.

Despite the serious nature of the virus, virologists and infectious disease specialists have urged calm. They note that Nipah outbreaks are usually limited in scale and can be contained with swift public health responses. Rapid isolation of infected individuals, careful monitoring of close contacts and strong infection control practices in hospitals are key measures in preventing further spread.

There is currently no specific antiviral treatment approved for Nipah virus infection. Medical care mainly focuses on supportive treatment, including maintaining breathing, hydration and organ function. However, several vaccines are under development and undergoing testing. Researchers around the world are working to develop safe and effective vaccines, but these are still in clinical trial stages and not yet available for public use.

Public health experts also recommend preventive measures in areas where the virus is known to circulate. These include avoiding consumption of raw date palm sap, washing fruits thoroughly, and preventing contact with bats or sick animals. Healthcare workers are advised to use protective equipment when treating suspected cases.

The recent cases in India serve as a reminder of the ongoing threat posed by emerging infectious diseases. While the overall risk to the wider population remains low, authorities across Asia are taking no chances. By increasing airport checks and strengthening surveillance systems, governments aim to detect any possible imported cases early and prevent further transmission.

For now, officials continue to monitor the situation closely. Travelers are encouraged to stay informed, practice good hygiene and seek medical attention if they develop symptoms after visiting affected areas. Vigilance, rather than panic, remains the key message from health authorities as they work to contain the situation and protect public health.