[nwrep]

Mexico has 2 advantages - very hot food, and hot weather. Both wear down the effectiveness of the virus. This is also why Northern Italy is more affected than Southern Italy.

[DesertRhino]

The corona cold mainly affects Orientals.

[arthurus]

It is not so much hot weather as sunshine, The sun is at a more effective angle in the southern latitudes and in the summer farther north. Hot weather is indirect. It causes people to dress in short sleeves and get sunshine on their skin. That is what kills the virus. Viruses thrive in 98.6 degree environments.

[ThanhPhero]

In Việt Nam flu and colds are thought of as being "women's maladies." Men mostly don't suffer from them except for government men and office workers. Women get viruses all year round, The difference is that men do not cover up. They go about exposing their arms and faces to the sun.
Women have heard since they were infants that they must never let the sun touch their skin or they will turn black and never get a husband. They cover up totally when they go out. That is beginning to change for the younger generation because they are adopting Western attire, short skirts and sleeveless dresses. And they are getting husbands. 0lder generations are noticing. 10 years ago I talked the women I know into exposing at least their arms to the sun for an hour each day. They have not been sick since. I discussed it with the husbands of those already married and they all decided that their wives could turn black and it was okay if they stayed thus healthy. One, in particular, was always sick when I first met her. She has been virus free for the ten years and as an added benefit her manic depression dissipated but that's another subject.