Influenza or flu is a respiratory infection caused by the influenza virus. This virus spreads through contact with droplets when a sick person coughs or sneezes.
Otitis media is an infection of the middle ear that causes inflammation and swelling of middle ear membrane and a build-up of fluid or pus inside the middle ear.
Nowadays, the recognition of sunburn is an effect of UVB which is one spectrum of the light, also the discovery of UVB-specific DNA mutations leading to establishment of UVB