Light pollution can prolong the risk of sparrows passing along West Nile virus
Under nighttime lighting, birds take longer to fight off virus attack
![sparrow](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/01/011818_SM_sparrow_feat.jpg?fit=860%2C460&ssl=1)
ABOUT THAT LIGHT Another reason for caution in lighting up the night comes from a study of house sparrow difficulties in fighting off West Nile virus, which mosquitoes biting the birds can then spread to people.
Thorsten Denhard/Wikicommons (CC BY-SA 3.0)