There’s been some talk of giving people who have recovered from the virus, “immunity passports,” to give them more freedom to re-enter social settings. The WHO is warning against such a strategy: “There is currently no evidence that people who have recovered from Covid-19 and have antibodies are protected from a second infection.”

+ “As Oxley, an interventional neurologist, began the procedure to remove the clot, he observed something he had never seen before. On the monitors, the brain typically shows up as a tangle of black squiggles — ‘like a can of spaghetti,’ he said — that provide a map of blood vessels. A clot shows up as a blank spot. As he used a needlelike device to pull out the clot, he saw new clots forming in real-time around it. ‘This is crazy,’ he remembers telling his boss.” WaPo: Young and middle-aged people, barely sick with covid-19, are dying from strokes.