Why were european diseases such as smallpox, typhus, and influenza so devastating to native populations?

At the point when the Spanish came, they brought dread and infection wherever they went. These floods of the plague illness may have included smallpox, flu, measles, mumps, looseness of the bowels, typhus, and pneumonia. The exact effect of smallpox and other European maladies all through the Americas is hard to report or fathom.

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No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun