Environmental health is one field of public health that takes into account environmental aspects in relation to health issues.
Health promotion has new challenges in COVID-19 pandemic. They have to tell all society about COVID-19 prevention such as are washing hands, maintaining distance and wearing masks even without meeting face to face.
HL Bloom in public health sciences states that there are four factors that affect community's health status, ie ranging from lifestyle, heredity, the environment and the health care system itself.
Epidemiology is a field in public health sciences. Broadly speaking, this study learn the pattern of the spread of a disease or health problems in the community and provide the data for program planning.