Age changes in COVID. Here are findings, and my take on them. First, findings. 1) confirmed cases are age demographically shifting younger, by a lot. 2) hospital inpatients are shifting younger, by a little bit. 3) Death age demographics are not shifting, at all. 1/

So, for the first, we have altered testing criteria. Our testing now is broadly applied, and our age demographics of cases look like S. Korea's in March. 20-40 year olds are the primary carriers/transmitters. 2/

As we have both expanded testing to younger folks, and retreated from hospital capacity, we are admitting younger, milder, cases that would not have qualified for inpatient status in April 3/

And deaths have not shifted in age demographics because there is not an actual shift in age demographics of infections. What is changing is the bias in our sampling, and not the sampled population. 4/4