The virus which causes Aids - HIV - was first identified by scientists more than 30 years ago.
Claudia Hammond explains how it first spread, and where it stands today.
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World Aids day: Where did it come from? - V?DEO
01 December 2014
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World Aids day is being marked by a series of events across the globe.
The virus which causes Aids - HIV - was first identified by scientists more than 30 years ago.
Claudia Hammond explains how it first spread, and where it stands today.
The virus which causes Aids - HIV - was first identified by scientists more than 30 years ago.
Claudia Hammond explains how it first spread, and where it stands today.
