WHO has said no travel restrictions are needed after recent Nipah virus cases in India. Here’s how the virus spreads, its symptoms, and how infection is diagnosed.

Nipah virus is a particularly dangerous infectious agent, causing acute encephalitis, rapidly progressing respiratory failure, and a mortality rate of 40-75%, yet it has a low transmission rate, and there is currently no specific treatment or vaccine.

UK health bosses have issued a warning following an outbreak of the Nipah virus in India. It comes as two cases of the deadly virus have been confirmed in West Bengal, according to Indian authorities.

A research team at the LKS Faculty of Medicine, the University of Hong Kong (HKUMed), has developed a novel live-attenuated vaccine candidate, cb1, capable of generating broad immunity against a wide range of beta-coronaviruses with a single intranasal dose.