Complex sentence: Henipaviruses are characterised by long genomes, a wide host range, and their recent emergence as zoonotic pathogens capable of causing illness and death in domestic animals and humans is cause of concern.
Split into simpler sentences: Henipaviruses are characterised by long genomes and a wide host range. Their recent emergence as zoonotic pathogens capable of causing illness and death in domestic animals and humans is a cause of concern.