Public Health Officials across the Bay Area are urging residents to keep their faces covered when they leave their homes in an effort to prevent the spread of the novel coronavirus. The announcement asks people not to use surgical or N95 masks, which need to be reserved for healthcare workers and first responders. Instead, it is recommended that residents use bandannas or fabric masks, which are primarily used to keep others safe from germs. Wearing face coverings is not a replacement for staying indoors, however. Health experts still say sheltering in place, frequent hand washing, and social distancing are the best ways to prevent the spread of COVID-19.