It's the second year of the pandemic and the DEF CON hacker conference wasn't canceled. However, the Delta variant is spreading. I thought I'd do a little bit of risk analysis. TL;DR: I'm not canceling my ticket, but changing my plans what I do in Vegas during the convention.
First, a note about risk analysis. For many people, "risk" means something to avoid. They work in a binary world, labeling things as either "risky" (to be avoided) or "not risky". But real risk analysis is about shades of gray, trying to quantify things.
The Delta variant is a mutation out of India that, at the moment, is particularly affecting the UK. Cases are nearly up to their pre-vaccination peaks in that country.
Note that the UK has already vaccinated nearly 70% of their population -- more than the United States. In both the UK and US there are few preventive measures in place (no lockdowns, no masks) other than vaccines.
Thus, the UK graph is somewhat predictive of what will happen in the United States. If we time things from when the latest wave hit the same levels as peak of the first wave, then it looks like the USA is only about 1.5 months behind the UK.
It's another interesting lesson about risk analysis. Most people experience these things as sudden changes. One moment, everything seems fine, and cases are decreasing. The next moment, we are experiencing a major new wave of infections. It's especially jarring when the thing we are tracking is exponential. But we can compare the curves and see that things are totally predictable. In about another 1.5 months, the US will experience a wave that looks similar to the UK wave.
Sometimes the problem is that the change is inconceivable. We saw that recently with 1-in-100 year floods in Germany. Weather forecasters predicted 1-in-100 level of floods days in advance, but they still surprised many people.
Nevada is ahead of the curve in the US, probably because Vegas is such a hub of unvaccinated people going on vacation. Because of exponential growth, there's a good chance that in 2 weeks, that peek will be triple where it is now. It may not look like "time to cancel your ticket" now, but it probably will in 2 weeks when the event takes place. In other words, the closer we get to the event, the more people will look at this graph and cancel their tickets.
But still, death isn't the major concern. It appears the major concern is long term-lung (and other organ) damage caused by even mild cases. Thus, one should fear infection even if one believes they have no chance of dying.
Regarding the lung damage thing, a potentially interesting dataset is the hospitalisation numbers for the UK (https://ourworldindata.org/grapher/uk-daily-covid-admissions). It seems plausible that lung damage is correlated with having a severe case, which is correlated with winding up in hospital.
Like deaths, things are much better than they were in previous waves as compared to number of cases. But the numbers are still far from low.
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