As a public health professional who has followed protests in Kashmir, Dr Sonali Vaid knew well the effects of tear gas. An Indian data journalism website in August found tear gas shells had killed five people in Kashmir between January 2010 and May last year.
So, when Dr Vaid read last month that tear gas was used against protesters in New Delhi opposing an amended citizenship law, she composed a WhatsApp message on the do's and don'ts about tear gas injuries and sent it to her contacts in the Indian capital.
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