Thailand's Department of Disease Control screens travelers from West Bengal, India at Suvarnabhumi & Don Mueang airports starting 25 January amid Nipah virus outbreak. Health officials implement strict measures as passengers show excellent cooperation at checkpoints. pic.twitter.com/0SozySiBo5

Severe cases can lead to brain swelling, or encephalitis, where symptoms can include confusion, drowsiness and seizures.

Scientists have identified 22 genes that explain why one common virus leaves many people unharmed but puts others at risk of chronic and sometimes lethal diseases. An international research team from the pharmaceutical company AstraZeneca and US academic institutions discovered the traits,

The adenovirus is a new strain that attacks the respiratory system, eyes, kidneys and, other organs seemingly in minutes — with no cure yet available.

The UK Health Security Agency (UKHSA) has issued advice following the spread of a deadly virus with no cure and no vaccine. India has officially reported two cases of the bat-borne pathogen spreading in hospitals in the eastern state of West Bengal.