A lot can happen in a short week’s time. Last weekend, “Saturday Night Live” opened its episode with a press conference about COVID-19 that turned into an impromptu democratic presidential hopefuls press conference because the primaries were the bigger story. But just seven short days later, most of those candidates had dropped out of the race, leaving Bernie Sanders and Joe Biden last men standing, and COVID-19 became a top news story for the events that canceled due to concerns (everything from SXSW in the U.S. to Mip TV in France) and the states of emergencies declared in places including New York. So the March 5 episode of NBC’s late-night sketch comedy show put its spotlight on the virus -- but threw in a surprise political cameo for good measure.