you are correct on your calculation of the 28 days. But you cannot expect them to read out right away. There are rules for unblinding. That is why they gave the one month; it pads all sorts of delays you could experience with a readout. Hopefully the ball is hit out of the park. Maybe they do what was done in the mild to moderate and talk about SAE's right away. It should be much more pronounced on the Severe to critical than the Mild to moderate.