Chandra Datta, S. (2020) “NGO Act as Potential-Policy-Developer Social-Vaccine-COVID-19 Epidemic-Model until Discovery-of-Medical-Vaccine: Achieved Green-Socio-Economic Welfare Science Technology Innovations”, Archives of Community Medicine and Public Health, 6(2), pp. 225–232. doi: 10.17352/2455-5479.000111.