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Human immune deficiency virus is considered an emerging virus because it __________.

User River Tam
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Human immune deficiency virus wasn't discovered until 1983. It is a fairly new unearthing.

Human immune deficiency virus is considered an emerging virus because it was, previously, unheard of.

I hope this helps!
User Zaki
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because it was perviously unknown
User Tuure Laurinolli
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