Venezuela has it. Brazil has it. Follow what happens there. Someone posted yesterday it takes IIRC two weeks to hit 6,000 cases. Check back. In two weeks and see how they are doing. If they have less maybe it is light and moisture sensitive.
India basically doesn’t have it. Neither does Indonesia.
Cases there are imported (ie, travelers from Italy or Iran).
Viruses don’t do well in high heat and high humidity. Nobody knows why, and some kind of studies should be done (is it heat, humidity, vitamin D, or ultraviolet light?)
Yeah, the southern hemisphere is getting colder every day, as the northern hemisphere gets warmer every day. That may be one possible explanation as to why. However, I can’t explain why Australia has seen so many cases. Perhaps it’s because more people actually visit there, and they have a larger population of Chinese who had visited Wuhan during the Chinese New Year.