Covid-19 Positive Tests and Deaths by State, Smoothed Data

You would usually think that raw data would be more accurate than smoothed data. But in the case of the Covid-19 pandemic, smoothed data reduces reporting anomalies and is a more accurate representation of timing than the raw data is.

Many states do not report results daily (which you can easily see in the raw data charts). Many states show weekly cycles of under-reporting on certain days and over-reporting on other days. There are some subtleties to how smoothing should be done. For more details, check out my Medium article on this topic.