“Go back to where you come from. You don’t belong here,” she calls out. I’m stunned. It’s March 6, 2020, and a stranger, out of nowhere, has just spit on me at Reno-Tahoe International Airport. There’s a virus in the news, something that came from China, but it’s still a few days before the country really starts buckling under the weight of Covid-19. Personally, I’m just trying to get to my flight to San Francisco.