Vol. 6, Issue 10, Part I (2020)

Abstract
A key concept for epidemic control is to grow herd immunity (population immunity, community immunity, or social immunity). It has been observed that only a percentage of a population needs to be immune to stop generating large outbreaks. Based on the large number of infected people it is suggested that this is likely the zoonotic origin of COVID-19. Inter personal transmission of COVID-19 infection led to the isolation of patients that were subsequently administered a variety of treatments. In this study it is seen that 7 districts out of 23 is experiencing a large intensity due to COVID-19. Kolkata and its surrounding districts are found maximum concentration of COVID cases. On the other side, some districts of northern part of West Bengal are also suffering severely from remarkably high number of COVID cases. But the effective measures against community transmission of COVID-19 have been implemented to control the current outbreak. The present review indicates that special attention should be applied, and efforts are to be given for susceptible populations including children, health care providers, and elderly people to protect or reduce transmission of COVID-19. This review is an effort to highlight the district wise immunity building and workflow, epidemiology, transmission analysis and future directions to control the spread of this fatal disease in West Bengal.