I found the maps shown on the CDC website not quite intuitive since it just shows the number of cases. But more importantly, we should look at per capita how many are infected. The map below shows the total number of confirmed cases over the population for each state. From the map, we can see that even California has many cases, it is doing quite well relatively.
Since there are unobserved cases, the number of deaths often give better estimation of actual numbers out there. Below shows the # of deaths per 100 people over population in each state. Since the coronavirus has approximate fatality rate of 1%. The map below gives a rough estimation of actual numbers of cases.
Now let’s take a look of the Oklahoma data. The plot below showed the respective rates as the national data. I obtained the data from the State Department of Health.
It is interesting to see that Central OKC region seems to be doing better than the Northeastern Tulsa region. But an individual county (Greer) is in pretty dire situation. Again, the death rate probably gives a better idea of how many undetected cases out there. Even though there is likely to have lag. Update (7/15): almost a month after Trump rally in Tulsa, the total number of cases in Tulsa is now the highest in Oklahoma. But the death rate is about in the middle compared to the rest of the state.