Can someone smart explain to me how ANY annual virus stops before it infects most of the planet?
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I believe it may migrate back and forth between hemispheres. Thus, seasonal.
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I think you are right.
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Viruses can't make the equatorial jump without hitching a ride on an infected host.
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Goes back and forth. For instance, seasonal flu vaccine of northern hemisphere is derived from what went viral in Southern Hemisphere and so on.
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look at the number of cases south of the equator may change if there's widespread outbreaks in countries in Africa
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I could give you the Sunday school answer...
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There are plenty of cases of Corona in countries that currently have weather at around 30C. E.g Singapore
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Good read. Most people with the flu stay home away from others, reducing spread. Not everyone that come in contact gets infected.
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