The portal of entry of alludes to the way wherein a microbe enters a helpless host. The portal of entery must give access to tissues in which the microorganism can duplicate or poison can act.
Frequently, infectious agents such as bacteria and viruses utilize a similar entry to enter another host that they used to exit the source to have. These portal of entery can be puncture in the skin or cut in the skin as asked in the question that is made by the sharp obeject in the chain of transmission.
The answer is Human is a social being. People have different settings according to their occupation and activities. Fundamentally home, school and community are considered as the scope of health education from the socio -cultural point of view.