> There's a billion people in India and so far the mortality and spread rates there aren't similar to other countries

That is a lack of testing, same as what keeps US numbers depressed. India is severely lacking in cohesive response to viral outbreaks, to the point they are still dealing with a Swine Flu epidemic from 2009 (https://www.indiatoday.in/india/story/9-swine-flu-deaths-utt...)

> There is a theory that humid and warm places will not have these mortality rate

There is no scientific evidence to support this. The wild spread in the Middle East indicates heat may not be a factor.