Chandra Datta, Subhas. 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):225-32. https://doi.org/10.17352/2455-5479.000111.