Question: I’ve been reading about how cases are trending younger in lots of different states. Is this true nationally?

Answer: I was reading that too, with Dr. Fauci recently having stated earlier in July that “the average age of people getting infected is now a decade and a half younger than it was a few months ago.” Still, I hadn’t been able to find the supporting data. CDC shows cumulative age distribution of cases here, but because these aren’t time trend data, they don’t help us answer the question. A few days ago, CDC released its updated case surveillance public use dataset. And my friend, Dr. YJ Choi (find some of her other COVID-related work here) ran the numbers to see national trends. Sure enough, cases across the country are getting younger (Figure 1).

Figure 1. Weekly reported cases by age (%)