This is a retrospective analysis of 2.7 million infections during 186 districts and 22 states (out of 3.6 million from 739 districts), during April 15-August 31.

The infection spread over the months, if you notice, is not geographically continuous. It pops up in different regions. Two questions, 1. Why so? 2. Can we see a pattern in what is happening.

Which regions need more attention in terms of tests, or critical care facilities?

Needless to say COVID-19 cases are almost everywhere where is the "center of gravity" of the infections shifted steadily from districts with international airports to districts with domestic airports.

If the trend continues, then soon the smaller districts which can only be reached by trains (and more importantly which also happen to be the ones with not as many health care resources) are next in line. Sufficient testing, care must be planned.

If in the meantime the territory gained in the larger districts continues to hold well, not snap back, one may even think of reassigning resources.