Turn the facts in this paragraph into a series of questions and answers, in a bullet list, following this format: {question}: {answer}.

Everyone should wear a high-quality mask indoors if they’re in part of the country where the Covid-19 community level is high. Community levels are determined base on local cases, hospitalization rates and hospital capacity. According to the CDC, about 40% of US counties had a high Covid-19 community level as of August 11.
“People who have known or suspected exposure to COVID-19 should also wear a well-fitting mask or respirator around others for 10 days from their last exposure, regardless of vaccination status or history of prior infection,” the CDC’s website states.

• What should everyone wear while indoors if they're located in a Covid-19 high community?: Everyone should wear a high-quality mask while indoors in a Covid-19 high community.
• According to the CDC, what percentage of US counties has a high Covid-19 community level as of August 11th?: As of August 11th, 40% of US counties had a high Covid-19 community level.
• How long should someone who has a known or suspected exposure to COVID-19 wear a mask while around others?: Anyone who has known or suspected exposure to Covid-19 should wear a mask for 10 days since their last exposure while around others.