With health workers seen trekking mountains, crossing rivers to vaccinate people in their homes and agriculture fields, Jammu and Kashmir have given the first dose of Covid-19 vaccine to 75 per cent of the population in the above 45 years age group. According to the officials, in districts of Ganderbal, Jammu, and Shopian 100 per cent population have been vaccinated for the first dose. So far, 30 per cent of the population has received the first dose in Jammu and Kashmir.