https://www.futureelectronics.com/resources/featured-products/wurth-elektronik-wl-sumw-ultraviolet-ceramic-waterclear-uv-leds . How can you disinfect with UV-C LEDs? UV-C light is exceptionally potent of inactivating germs, bacteria and viruses.
They may help reduce the spread of viruses such as the Coronavirus but will also remain of high importance after the pandemic. https://youtu.be/t5zlJTpZwGo