University of Auckland May 23 2025 A breakthrough study, led by scientists at Waipapa Taumata Rau, University of Auckland, has uncovered how daylight can boost the immune system's ability to fight infections. The team focused on the most abundant immune cells in our bodies, called 'neutrophils', which are a type of white blood cell. These cells move quickly to the site of an infection and kill invading bacteria. The researchers used zebrafish, a small freshwater fish, as a model organism,