According to ScienceDaily, Australian researchers have discovered that exposure to ultraviolet light (such as sunlight) significantly reduces asthma-like symptoms in mice.

"This research clearly shows that controlled exposure to ultraviolet light markedly limits the development, incidence and severity of asthma symptoms in mice," said Associate Professor Prue Hart of Perth's Telethon Institute for Child Health Research. "It appears that sunlight can suppress specific immune reactions, so we are now working to better understand that mechanism with the aim of generating new ways to prevent and treat this chronic disease."