Tuesday is World AIDS Day. The theme this year is Think Positive: Rethink HIV. The National AIDS Trust is asking people to share facts that will tackle stigma and dispel myths. Did you know that if someone diagnosed with HIV is on effective treatment they are not infectious and they have a normal life expectancy? Next year marks the 30th anniversary of the Don’t Die of Ignorance campaign; research and treatment has come a long way in three decades but there’s still more to do.