The Risks Digest – Rob Slade – “Now that vaccines have started to roll out, we have a new risk management lesson from them. Most of the vaccines that have been approved so far are two-dose vaccines. With the rush to get vaccines into people in the most expeditious manner, there is now a new controversy. Do you give as many people as possible one dose of the vaccine, or do you hold back doses so that there will be a guaranteed supply for those who need a second shot?… The calculus involved here is complex. It involves the infectiousness of the virus, the effectiveness of the vaccine, the total numbers of cases, and a number of other considerations. However, in our situation, the answer seems to fall on the delay side of the equation…” [h/t Pete Weiss]