After an awful start, US testing capability has dramatically increased over the past two weeks, and should continue to increase as lab testing companies like LabCorp and Quest Diagnostics ramp things up. When we began testing for COVID in the united states, the CDC required that each patient have two swabs performed - one swab of the nostrils and one of the mouth. Last week the CDC got rid of that requirement which effectively doubled our testing capability. Unfortunately, we are still dramatically underdetecting COVID in the United States; several epidemiologists have calculated that we need to be performing about 100,000 tests per day in order to catch up with the disease. The @COVID2019tests twitter provides semi-regular updates on our testing capability.Update 4/6/2020: There has been an explosion of data and infographics for testing data in the United States. Here are couple that I like: