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02.06 - 18:42
COMMENTARY: How viruses can leap from animals to humans
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Viruses are naturally occurring entities. Viruses have existed on Earth long before humans and vastly outnumber humans. There are more viruses on Earth than there are stars in the universe or cells in the human body.
As a cellular microbiologist who has studied the origin and development of infectious diseases and their prevention, understanding where infectious agents come from is as important, if not more important, to understanding how to combat the rampant spread of diseases within the human population.
Fortunately, only a small fraction — about 200 — of this vast array of viruses can infect humans. Some of the better-known human viral infections include measles, varicella, polio, human papilloma virus, influenza and rhinoviruses, which
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COVID-19
United States
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Cases: 46 252 513
Deaths: 750 423
Recovered: 0
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India
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Cases: 34 321 025
Deaths: 459 652
Recovered: 0
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Brazil
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Cases: 21 835 785
Deaths: 608 235
Recovered: 0
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United Kingdom
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Cases: 9 215 683
Deaths: 141 607
Recovered: 0
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Russia
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Cases: 8 494 589
Deaths: 237 619
Recovered: 0
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