There's a whole lot of other possible confounding hypotheses here: more frequent outdoor activity, increased ventilation in buildings, increased sunlight, lower

There's a whole lot of other possible confounding hypotheses here: more frequent outdoor activity, increased ventilation in buildings, increased sunlight, lower population density, lower spread from international travelers, less robust reporting, the "worst medical systems in the world" resulting in a smaller relative fraction of the population at high risk of covid surviving everything else, less cultural offense at being told to wear a mask, etc.