Looking back at the AIDS virus 40 years after 1st cases found in US
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HIV was first identified as a mysterious illness in five otherwise healthy young gay men. SUBSCRIBE to ABC NEWS: https://bit.ly/2vZb6yP Watch More on http://abcnews.go.com/ LIKE ABC News on FACEBOOK https://www.facebook.com/abcnews FOLLOW ABC News on TWITTER: https://twitter.com/abc
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