New Delhi, July 11 (ANI): Health Minister Dr Hrash Vardhan along with Bollywood Actor and Social Activist Shabana Azmi participated in a Walkathon organized in New Delhi on World Population Day. On the occasion Harsh Vardhan congratulated the entire nation's citizens and very especially the youth. He also sent a message to all family heads to keep their families small so that proper attention can be given to every child in terms of health and education.