There are millions of us living with HIV. Why do we seem invisible?

Out of 120,000 people locally, and 37 million worldwide, it's unlikely we'll be the first positive case someone comes into contact with. "Should I tell them?" is often the question that divides opinions. And even though we're not obligated to do so, even though there are laws protecting our confidentiality, the question should be: Why should I tell them? And in what context?