Viruses spread, evolve, and adapt — but are they alive? This documentary explores one of biology’s biggest mysteries.

“The nose is very good at warming up the air to stop the lungs becoming irritated by the cold weather,” explains Whittamore. ...

Like chikungunya virus, dengue is spread by Aedes aegypti and Aedes albopictus mosquitoes. Both viruses share the same control interventions and non-specific symptoms of headaches, a rash, fever and ...