World Aids Day: Here's how the day was commemorated

US scientists found first clinical evidence for disease that would become known as AIDS in 1981, according to United Nations. (Photos: AP, PTI)

Students make a formation of AIDS symbol on the eve of World AIDS Day, in Chennai. (PTI)

A volunteer applies body paint to raise awareness for AIDS on the eve of World AIDS Day. (PTI)

An activist holds a placard in the shape of the red ribbon, the universal symbol of awareness and support for those living with HIV. (AP)

Participants hold placards in the shape of the red ribbon, the universal symbol of awareness and support for those living with HIV, as a hot air balloon is released during an awareness campaign ahead of World AIDS Day. (AP)

World AIDS society members make a formation of the red ribbon, used to spread awareness and extend solidarity towards people living with AIDS, on the eve of World AIDS Day, in Ahmedabad. (PTI)

Volunteers light candles making a formation of the red ribbon, used to spread awareness and extend solidarity towards people living with AIDS, on the eve of World AIDS Day, in Agartala. (PTI)

Sand sculptor Sudarsan Pattnaik creates a sand art to spread awareness and extend solidarity towards people living with AIDS. (PTI)

On the occasion of World AIDS Day, Sand Art has been created to generate awareness about HIV/AIDS by Sand Artist Narayan Saho. This sand art took 7 hours to complete and thousands of people came to look this art work as it was made at Juhu Chowpatty, in Mumbai.(Photo: Mrugesh Bandiwadekar)