Public health:How public health is concerned with protecting the health of entire populationsScales of operation of public health efforts, from local community to a whole countryDesigning educational programsRecommending policies to multiple government bodiesAdministering services through various structures of center, state, district, and block level setupsChallenges in conducting researchProblems of healthcare equity, quality and accessibilityChallenges in helping people with metabolic, lifestyle, and infectious diseasesOverload and collapse of infrastructureChallenges of physician shortage and poor trainingNeed to improve systemMeasures taken to combat COVID19Successful measures by GOI M. The way ahead