What is the Nipah virus?

What is the Nipah virus?

 News of a virus outbreak can still trigger uneasy memories of 2020, when a previously unknown coronavirus went on to reshape everyday life across the world. With the Nipah virus now making headlines, many are asking whether there is any cause for concern in the UK.

Recent reports show a rise in confirmed Nipah virus cases in India, prompting some neighbouring countries to reintroduce health screening measures. While the situation is being closely monitored, experts stress that the virus remains rare and geographically limited.

Nipah virus is carried primarily by fruit bats found across South and Southeast Asia. Humans can become infected through direct contact with these animals or by consuming food and drink contaminated with bat saliva or urine, such as fruit or raw palm sap. The virus can also spread to other animals, including pigs, dogs, cats, goats, horses and sheep, which may then pass the infection on to humans.

Symptoms typically appear between four and 21 days after exposure. Early signs often resemble the flu, including fever, muscle pain and vomiting. In more severe cases, the infection can progress to respiratory illness and encephalitis, a dangerous inflammation of the brain.

Nipah virus is particularly concerning because of its high fatality rate. Between 45 and 70 per cent of infected individuals do not survive. There is currently no approved vaccine or specific treatment. Among those who do recover, around one in five experience long-term neurological complications such as seizures or lasting changes in behaviour, according to the World Health Organization.

Outbreaks occur almost every year in Bangladesh, with additional cases reported in countries including Malaysia, Singapore and the Philippines. The virus was first identified in 1998 during an outbreak among pig farmers in Malaysia, where more than 100 people lost their lives.

While the virus is undoubtedly serious, health authorities note that it does not spread easily between people and remains confined to specific regions, making the risk to the UK public extremely low at this time.

Where is the virus now?

The recent Nipah virus cases reported in India have been confined to West Bengal, the country’s fourth most populous state, health officials have confirmed.

So far, only two laboratory-confirmed infections have been identified. Both patients are 25-year-old nurses who work at the same private hospital in Barasat, Katoya. Authorities have pushed back against earlier reports suggesting five cases, stressing that only these two have been verified.

The nurses—a man and a woman—began experiencing symptoms in December before their conditions rapidly worsened, requiring emergency medical treatment. The male patient is now recovering, while the female patient remains in a coma.

Investigators are still working to determine how the pair became infected. One possible source under consideration is exposure to contaminated palm sap during a visit to the village of Ghughragachhi, though this has not been confirmed.

Contact tracing has so far found no signs of wider spread. Nearly 200 people who had close contact with the patients were tested for Nipah virus, and all results came back negative, according to the World Health Organization. As a precaution, around 100 individuals were temporarily quarantined in hospital.

In a statement, the WHO said India has demonstrated strong capacity to manage Nipah outbreaks based on previous experience, adding that national and state health authorities are jointly implementing recommended public health measures. The organisation also confirmed that there is currently no evidence of increased human-to-human transmission.

Despite the limited number of cases, several countries in the region have stepped up surveillance. Thailand, Nepal and Taiwan are now monitoring travellers for symptoms of Nipah virus. Some airports have introduced health screenings before passengers enter terminals, while others are distributing health advisory cards to arrivals.

Could Nipah virus lead to a global lockdown in future?

There is no reason to panic or start stockpiling household supplies, according to Ian Jones, professor of virology at the University of Reading, who has sought to reassure the public over concerns surrounding the Nipah virus.

Jones explained that Nipah is fundamentally different from Covid-19, which spreads easily through airborne droplets released when infected people cough or sneeze. By contrast, Nipah does not transmit efficiently from person to person.

While the virus is undeniably serious due to its high fatality rate, Jones said the risk remains largely limited to close contacts such as family members and healthcare workers caring for infected patients.

He added that in the wake of the Covid pandemic, any emerging virus is quickly met with fears that it could spiral into another global crisis. However, Nipah does not fit that profile. The virus is not airborne and has never shown evidence of spreading through the air, making a worldwide pandemic scenario extremely unlikely.

The World Health Organization classifies Nipah as a potential epidemic threat, meaning it has the capacity to cause sudden regional outbreaks. This is distinct from a pandemic, which refers to a disease that spreads across multiple countries or continents.

The novel virus is spread by fruit bats

Summing up the situation, Jones said Nipah is a highly dangerous but geographically limited virus, and that its spread can be significantly reduced through strict hygiene measures and public education.

He stressed that while the illness is serious, it does not pose a pandemic risk.

‘But it is not a pandemic threat.’

What is the UK’s current guidance around Nipah virus?

The UK Health Security Agency (UKHSA) has updated its guidance on the Nipah virus, emphasising that the move is precautionary rather than a cause for public concern.

Officials said the update is simply about ensuring people understand what the virus is and how it spreads. There have been no recorded cases of Nipah virus in the UK, and the Foreign Office has not added the virus to its travel advisories for India.

For those travelling to countries where Nipah is known to occur, the UKHSA has outlined a series of sensible precautions. Travellers are advised to avoid contact with bats and bat habitats, particularly if animals appear sick. They should also steer clear of raw or partially fermented date palm sap, making sure any palm juice is properly boiled before consumption.

The agency further recommends washing fruit thoroughly with clean water, peeling it before eating, and wearing protective clothing and gloves when handling sick animals or during slaughter and culling. Regular handwashing and good hygiene practices are also strongly encouraged.

UKHSA officials stressed that for tourists who follow these safety measures, the risk of contracting Nipah virus in endemic regions remains very low.