I wouldn't put too much stock in ANY data on Coronavirus. No doubt, lots of infected being sent home with a prescription and told to quarantine without "officially" being tested or reported.
See Chris A's first post on page 5 of this thread.
"The effect that this would have, I think (and Texas has a pretty good track record for public health relative to geographically adjoining states) is that under-reporting of non-hospitalizations during these "pandemics" is probably the norm."