 The revision classes of PhD so let's do some revision of our topic so far we are covered. So these are the common principles which are asking for university paper that is principles of epidemiology, principles of health education and principles of primary health care. So what happens during the exam you get confused with the principles because you have studied all these but at the moment of writing you might get confused. So by keeping this picture in your mind you will never get confused the principles of epidemiology and health education and primary health care they are entirely different but sometimes maybe because of any random error you might get confused and write the wrong answer and you will end up losing the marks completely. So never get confused so keep this picture in mind. So let's see what are the principles we have already covered these topics. So principles of epidemiology so epidemiology the definition we know it is the science of distribution and determinants of health related states or events and application to prevent the diseases. So this is study of disease among a common people so we have principles that is exact observation, correct interpretation, rational explanation and scientific construction. So the short form is ECRS the acronym is Every Coffee Requires Sugar so always keep in mind you can connect coffee with epidemiology, okay so every coffee requires sugar that is just a shortcut to remember epidemiology principles. The next principles is health education. Health education is a very big chapter and lots of questions been asked and health education the approaches of health education principles, the communication, the health education and propaganda, the methods of health education, individual group and mass method like group discussion, panel discussion, workshop, role play so many other. So this principle of health education are interest, credibility, participation, known to unknown, community leaders, seeds also over comprehension, reinforcement, motivation, good human relationships, I am setting an example. This is health education, this comes under principles of health education, okay. So let's see what are the principles of primary health care. Primary health care is a different concept where the health is provided at the grass root level or at the doorsteps of people. It was started by 1978 Almata conference and big countries like India is following primary health care concept because the providing health care at nearest point or wherever it is accessible will be way better than creating so many medical colleges and other tertiary level health centers. So primary health care, the concept principles are equitable distribution that we should be not equally distribute we should based on the felt need or based on the need of the people we should distribute the health care that is equitable distribution, equality and equity is different and the community participation is the key role that's why we are involving Asha workers village health guide people bringing we create health workers from within the community where we are providing this health care the intersectional coordination that is a multitude of or the multi sectoral or intersectional approach is very much vital for the success of primary health care and appropriate technology proper technology we should provide. So the short form is ECIA so I made it as during a cake is awesome okay so this is sugar and this is cake so this is just a tip to remember the principles equitable distribution community participation intersectional coordination and appropriate technology EC and coming in both epidemiology and primary health care so always keep in mind what is the concept and whether that applies to this so never get changed between epidemiology and primary health care this is how we contact a study this is how the health will be provided to people at a grass root level okay so these are the common question asked for university that is under public health industry or community dentistry subject the principles of epidemiology and principles of health education and principles of primary health care so never get confused always keep in mind this picture okay I'll come up with another revision series in dentistry more thank you