How Accurate Is The Data On This Coronavirus

It is not representative. We are looking at different time series, where the number of people that died yesterday are, in fact the number of people that died yesterday. The number of people that tested positive yesterday though doesn't tell you as much because the test results take four days to get, they are delayed, and then maybe the patients did not show symptoms for 10 days before they even got test. So the testing data significantly lags the infected population, and may not represent much of anything.