It’s standard procedure to wear protective gear, including masks.

January 13, 2018 no comments dollarmailclub Categories recipes
Doctors treat patients infected by the COVID-19 coronavirus at a hospital in Wuhan, in China’s central Hubei province, on February 24, 2020.

Protective gear varies based on the level of risk providers face, but the CDC recommends gowns, masks or respirators, googles or face shields, and gloves.
Healthcare workers need masks to protect themselves from the infectious germs they’re exposed to in hospitals. If they come down with an infection themselves, masks also prevent them from spreading their germs to vulnerable patients.