Stuart Malcolm, a doctor with the Haight Ashbury Free Clinic, walks by a supportive sign on a boarded-up shop in San Francisco on Tuesday. NPR is launching The National Conversation with NPR’s All Things Considered where we’re going to have experts answer your questions about the coronavirus.

Stuart Malcolm, a doctor with the Haight Ashbury Free Clinic, walks by a supportive sign on a boarded-up shop in San Francisco on Tuesday. NPR is launching The National Conversation with NPR’s All Things Considered where we’re going to have experts answer your questions about the coronavirus.