What is the Nipah virus and why is it so deadly?

The World Health Organisation says Nipah is one of eight diseases that could cause an epidemic and it could be as dangerous as Ebola and Zika. The virus first emerged among pig farmers in Singapore and Malaysia, and has now killed at least 10 people in India. https://cna.asia/2LjHZtg Channel NewsAsia's Glenda Chong with more.