Nipah Virus: How to Respond Scientifically
发布时间：2026.02.04
Recently, a Nipah virus outbreak has occurred in West Bengal, India, with five confirmed cases and over 100 people placed under quarantine, drawing widespread attention. Neighboring countries such as Nepal and Thailand have stepped up border surveillance, while China added the virus to its list of diseases subject to entry‑exit monitoring in December 2024.
The True Nature of the Virus: It’s Not a New Virus
Many people, upon hearing about Nipah virus, mistakenly assume it is a novel pathogen; in fact, it was first identified by humans long ago. In 1998, the virus erupted for the first time in Kampung Sungai Nipah, Negeri Sembilan, Malaysia, and in 1999, scientists isolated the virus from patients and named it after that village.
Historically, the Nipah virus has repeatedly triggered severe outbreaks. During the 1998–1999 outbreak in Malaysia, it resulted in 105 deaths. Due to variations in epidemiological surveillance and clinical management capacity across affected regions, the case-fatality rate ranged from 40% to 75%.
How is the virus transmitted?
The core mode of Nipah virus transmission is cross-species spillover from animals to humans, with limited human-to-human transmission also occurring. Transmission through routine social contact is relatively inefficient, so there is no need for undue panic.
01
Animal-to-human transmission
The natural reservoir of the Nipah virus is fruit bats, which can carry the virus without becoming ill and continuously shed it through saliva, urine, and feces, thereby serving as a “mobile viral reservoir.” In addition, domestic animals such as pigs and horses can act as intermediate hosts; for example, during Malaysia’s first outbreak, slaughterhouse workers were infected through contact with secretions from diseased pigs.
Locally favored raw date palm juice and unwashed wild fruits, if contaminated by fruit bat secretions or excreta, can directly infect humans upon consumption, without the need for an intermediate host. Reports indicate that during this outbreak, some infected individuals consumed raw date palm juice tainted with bodily fluids from virus-carrying fruit bats.
02
Interpersonal communication
It is primarily transmitted through contact with the nasopharyngeal secretions, urine, blood, and other bodily fluids of infected individuals. The risk is concentrated among family members of patients and healthcare workers, and it can easily trigger cluster outbreaks within healthcare facilities. For example, during the current outbreak in India, several healthcare workers were infected while treating the first case.
What are the symptoms after infection?
The incubation period of Nipah virus typically ranges from 4 to 14 days, with a maximum of up to 45 days. In the early stages of infection, symptoms resemble those of common influenza and are easily misdiagnosed, primarily manifesting as fever, headache, muscle pain, vomiting, and sore throat.
As the condition progresses, patients may experience dizziness, somnolence, and confusion, which can lead to acute encephalitis. In severe cases, complications such as pneumonia and seizures may occur, ultimately resulting in coma or even death.
Are there currently any vaccines or specific treatments?
To date, no Nipah virus vaccine has been approved for market use worldwide, nor are there any specific antiviral therapies. Clinically, treatment is primarily supportive and symptomatic.
However, the good news is that Chinese researchers have achieved a breakthrough: the Wuhan Institute of Virology of the Chinese Academy of Sciences recently published findings identifying a compound with potent inhibitory activity against the Nipah virus, paving the way for new approaches to its prevention and control.
Before vaccines and specific therapeutics were developed, “ Prevention First ” It remains the core strategy for addressing the Nipah virus.
How should the general public prevent it?
01
Stay away from sources of infection and avoid contact with wild animals.
Avoid direct contact with fruit bats, sick pigs, sick horses, and other animals that may carry the virus, and refrain from entering caves or woodlands where bats roost.
02
Pay attention to food safety and avoid the risks of consuming raw foods.
When traveling in South Asia and Southeast Asia, avoid drinking raw date juice or fresh fruit juices, and refrain from eating unwashed wild fruits. Always wash, disinfect, or peel fruits thoroughly before consumption, and ensure that meat is cooked thoroughly.
03
Practice personal protection and maintain good hygiene habits.
Wash your hands frequently with soap or hand sanitizer, especially before handling food, and wear a mask in crowded places or healthcare settings.
04
Pay attention to travel risks and proactively cooperate with monitoring.
Avoid non-essential travel to high-risk areas; upon returning from a region where an outbreak has occurred, seek medical attention immediately if you develop symptoms such as fever or headache, and proactively disclose your travel and contact history; if you feel unwell when entering or leaving the country, report it to customs without delay.
In addition to taking personal preventive measures,
Early diagnosis and early testing fortify the second line of defense in epidemic prevention and control.
Jinhao Pharmaceutical’s testing solutions support the surveillance and control of the Nipah virus outbreak.
References
* Choudhury Y, Islam A, Gurley ES, et al. Nipah virus transmission and risk factors in Bangladesh, 2001-2007[J]. Emerging Infectious Diseases, 2010, 16(12): 1882-1888.
* Luby SP, Gurley ES, Hossain MJ, et al. Risk factors for Nipah virus infection in Bangladesh[J]. The Lancet Infectious Diseases, 2006, 6(1): 23-28.
* Zhang H, Kornberg R, et al. Cryo-EM Structure of Nipah Virus RNA Polymerase Complex[J]. Science Advances, 2024, 10(50): eabq8765.
* Wang Chen, Li Lanjuan. Advances in Research on the Prevention and Control of Emerging and Outbreak Infectious Diseases [J]. Chinese Journal of Tuberculosis and Respiratory Diseases, 2023, 46(8): 561–568.
* Lo M, Rota PA, Wang L, et al. Genetic characterization of Nipah virus, Malaysia, 1998-1999[J]. Journal of Virology, 2003, 77(16): 8856-8864.
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