Pyro as Bill said:
Smoking was an early theory because of the male female disparity in China. Men have more of the receptor that the virus binds to. Anything that hinders the binding would offer some protection. |
Yes, but why is the male to female deaths ratio the same in China and NY, while the male female smokers ratio in US is 1.3 : 1 vs 25 : 1 in China. Half the males in China should have gotten some protection from smoking if that correlation in France holds truth, yet they still died at about the the same 1.75 : 1 ratio. (China 1.78 : 1, NY 1.73 : 1).
If smoking hinders the binding and offers some protection, why is it not showing up in the data. Not to dispute the French findings, but it raises more questions again.