1. It is our responsibility too since cleanliness is our concern also.
2. We can contribute by not throwing paper and dirt here and there,keeping the things in orderly manner,etc
3. Keeping classrooms clean.
4. Not damaging desks or other school property
5. keeping toilets clean.
6. Helping younger students in keeping the school neat-clean.
7. Not littering and keeping playgrounds clean.
8. Helping in maintaining safe school transport.
(b) (1) Importance of keeping the environment clean
(2) To make student understand that they alos have responsibility to keep the school and safeguard its property.

Prevention of Infection
"Infection of various kinds is the most important single cause of disease and death in this age period" This cannot be observed by an untrained midwife at the time delivery of in home.
The basic principles underlying preventive measures are:
1.Prevention of contact with infected individuals.
2.Maintenance of cleanliness.
3.Follow immunization procedures as given below:

(b) (1) Community service
(2) Social responsibility.

(i) Vaccination against small pox.
(ii) BCG vaccination against tuberculosis.
(iii) Polio drops against polio disease
(iv) Vaccination against chicken pox.
(v) Vaccination against Hepatitis
(vi) DPT vaccination against dipheria, pertusis
(viii) Immunisation against measles.
Major health problems are:
(i) Hepatites
(ii) Chicken pox
(iii) Tuberculosis
(iv) Tetanus.

The factors which are important for maintaining good health  and if not present will lead to diseases are:
(i) Availability of proper balance diet (food) in sufficient quantity and clean water.
(ii) Good environment or surroundings that includes physical environment, Public cleanliness is important.Stagnation of dirty water, presence of open drains, garbage, in the surrounding cause spread of diseases.
(iii) Good special environment is an important factor is maintaining good health.If people mistreat each other or some particular people, they are mentally ill, they cannot lead happy life.
(iv) Good economic condition or job is the major factor which causes disease.For example, to provide good and proper food, clean clothes and hygienic conditions, proper social relationship, good economic conditions are essential.

Immunisationis defined as protection of the body from communicable diseases by administration of some agent that mimics the microbe. This suspension of killed microbes that mimics the disease-causing microbes is known as vaccine.

Diseases spread through water when the excreta of any organism suffering from an infectious disease like cholera get mixed with the drinking water and this contaminated water is used by people living nearby.The infectious microbes enter in new hosts along with drinking water.This causes spread of diseases.This particularly happens in the areas where safe supplies of drinking water are not available.

The diseases which are not caused by any pathogen are called non-inectious diseases.The causes of non-infectious diseases may be
(i) Genetic abnormalities: Haemophilia, some type of cancers, etc.,
(ii) Internal causes:Such as high blood pressure can be caused by excess weight and lack of excerise.

(i) Communicable diseases - Malaria, Flu, Jaundice, etc
(ii) Non-Communicable disease - Diabates, cancer, heart disease, etcv

(i) Communicable diseases and
(ii) Non-communicable disease

(i) Exposure to air borne diseases can be prevented by providing living conditions that are not overcrowded.
(ii) Exposure to water borne microbes can be prevented by providing safe drinking water i.e., water treated to kill any microbial contamination.
(iii) The person suffering from an infectious disease should be kept in isolation
(iv) One should take balanced diet to make the immune system strong.This will also help in preventing infectious diseases.

1. The tissue-specificity of the infection leading to very general-seeming effect is seen in case of HIV infection.In this case, HIV infecting virus goes to the immune system and damages its functions.Therefore, body cannot fight off the many minor infections that we face daily.
2. For example, small cold can become pneumonia; a minor gut infection leads to major diarrhoea with blood loss.These and other such diseases may cause death of HIV-AIDS patient.Thus, the other infections kill people that are suffering from HIV-AIDS.
3. The tissue-specify of the infection is lymph nodes.General seeming effects are loss of immunity to even minor other diseases or other minor infections that lead to death of the patient.

(i) Immediate cause of disease is Infectious organisms like virus, bacteria, fungi, protozoan etc.For example, the cause of loose motions can be an infection with a virus, Here viruses is the immediate cause of disease.
(ii) Contributory cause of disease:
(a) poor health due to lack of good nourishment.
(b) poor economic condition due to which one does not get proper and sufficient food and lives in unhygienic conditions.
(c) genetic defects which cause some people more prone to disease than others.
(d) Lack of public services.