Highly contagious virus, which spreads from animals to humans, has a high fatality rate and there is no vaccine

Airports across Asia have been put on high alert after India confirmed two cases of the deadly Nipah virus in the state of West Bengal over the past month.

Thailand, Nepal and Vietnam are among the countries screening airport arrivals over fears of an wider outbreak of the deadly virus, which spread from animals to humans and has a high fatality rate.

The Indian health ministry has confirmed two cases in the state of West Bengal since December but said there had been a “timely containment” of the virus.

The government did not give details on the infected patients but said almost 200 close contacts had been tested and no further outbreaks had been detected.