Undifferentiated

If we just plopped down a dot for every observation we’d end up with an undifferentiated black blob, so the weathergami technique visualizes frequency of temperature pairs: we divide the chart area into a fine hexagonal grid, and then color each hexagon according to how many daily observations fall within it.

This further exacerbated the diagnostic challenge posed by undifferentiated febrile illness during a “twindemic” of both COVID-19 and dengue, as both illnesses could potentially present with febrile syndromes.