These are factors that stem human behaviours. It can also be defined as human habit. These behaviours might be due to personality, situation or reaction based on environmental factors. Some of the behavioural risk factors include as excessive use of alcohol consumption, physical inactivity, obesity and unhealthy food makes the human body vulnerable to diseases. In the current world situation, the body must be able to fight the deadly COVID-19 virus infections. Having the above behavioural factors can be risky.