Who were the people in Indian society who were considered so impure that one would be contaminated by touching them?

In traditional Indian society, those considered so impure that contact would result in contamination were primarily from the Dalit community, historically referred to as "Untouchables." They were subjected to severe social discrimination and exclusion, facing restrictions in daily life, including access to public spaces and resources. This deep-rooted stigma stemmed from the Caste System, which categorized people based on their occupation and social status. Despite legal protections and social reforms, the legacy of these beliefs continues to affect many in contemporary India.