An outbreak of the deadly Nipah virus in India's West Bengal state has sparked concern in parts of Asia, with some tightening screening measures at airports.
Thailand has started screening passengers at three airports that receive flights from West Bengal. Nepal has also begun screening arrivals at Kathmandu airport and other land border points with India.
Five healthcare workers in West Bengal were infected by the virus early this month, one of whom is in a critical condition. Some 110 people who were in contact with them have been quarantined.
The virus can spread from animals to humans. It has a high death range – ranging from 40% to 75% – as there is no vaccine or medicine to treat it.
What is the Nipah virus and what are its symptoms?
The Nipah virus can be transmitted from animals, like pigs and fruit bats, to humans. It can also spread person-to-person through contaminated food.
The World Health Organization has named Nipah as one of its top ten priority diseases, due to its epidemic potential.
Symptoms may range from fever, headaches, muscle pain, and vomiting to severe conditions like inflammation of the brain, known as encephalitis.
Where were the past outbreaks?
The first recognized Nipah outbreak was in 1998 among pig farmers in Malaysia. Since then, more outbreaks have occurred, particularly in Bangladesh and India, raising significant concern.
What is happening now?
Currently, five confirmed cases are reported, all linked to a hospital in Barasat. Precautionary measures are being implemented across the region as no cases have yet been confirmed outside of India.
In addition to Thailand and Nepal, Taiwan has proposed listing the Nipah virus as a 'Category 5 disease' to enhance preventive measures.
Additional reporting by BBC Thai
