RE: Heat and humidity suppresses the virus.
If so, I would expect tropical countries to have less of a problem with Covid-19. Are they?
India is experiencing few cases, Brazil a lot. Results vary.
Yes. There are a few exceptions like Sao Paulo (AC), Guayaquil Ecuador (buses and brothels) and a few other large cities. Away from the cities there's not much spread.
“If so, I would expect tropical countries to have less of a problem with Covid-19. Are they?”
There was an article posted today about India - Why wasn’t it as bad as they predicted?
They are talking about Brazil being at 90% capacity in their hospitals, but if you look at deaths per million people they are in good shape if they can get some help with having inadequate hospital facilities. India has done well, Mexico has done well. The main problem in these places seems to be that they lack critical care beds.
Tropical countries do generally report far fewer deaths and cases than more temperate countries.
It may be that most tropical countries are too poor to care, although the pattern still holds for wealthier ones, with exceptions.