SICKNESS AND DISEASE
The human body has a natural defence system against diseases. Various bacteria and micro-organisms represent dangerous invaders, attempting to weaken and destroy our body. The most important for the defence of the human body are the white blood corpuscles, which transport oxygen. Most diseases can be prevented at at least controlled. What’s important is healthy nutrition, a well-adjusted mind, good sleeping habits, activity in the fresh air, and contact with nature, avoiding stress, alcohol, cigarettes and drugs. We should protect our health as if it was our most precious possession. Health is the most important thing in the world.
Our contemporary world is bringing new discoveries, inventions, and progress in science. Together with all of this, however, new diseases are making their appearance as well. We are example- allergies, migraines, asthma. Unfortunately, new diseases keep appearing.

The gruesome diseases are leukemia, AIDS, heart attack or cancer. A great part of medical research is realized on the basis of cooperation and coordination among different counties, especially the research of cancer and AIDS.
LEUKAEMIA – cause the increase of white blood corpuscles in number. The bone marrow is attacked.
AIDS- is one of the most serious diseases which threaten people nowadays. Is it the viral disease that impairs the immune system of the human body which thus can get any infection. Those infections which are not dangerous for people with normal immune system ay be mortally dangerous for AIDS patients. It involves infection with the HIV virus. The virus damages the immune system of the human body by infecting white blood cells. The symptoms are persistent fever, fatigue, weakness, diarrhea weight loss, infection of the mouth. There are more means of transmission. Some of the known ways are through sexual intercourse, infected hypodermic needles and from the mother to its fetus. The virus is not passed on through touching or shaking hands. We cannot catch the virus by touching objects used by infected person- ups, cutlery, glasses, towels, toilet, seats etc. No cure has yet been found for this disease. AIDS was first identified in the USA in 1981 since that time increasing homosexuals; later AIDS was identified among intravenous drug abusers, hemophiliacs and other persons who had received blood transfusion. Despite the high level of awareness among the population and extensive publicity campaigns, new cases of infection keep on appearing.

The most common diseases nowadays:
Sometimes we succumb to the common cold, cough, angina, tonsillitis, toothache, headache, flu.

The symptoms may be: a temperature, perspiration, torpidity, pains and a bad mood.
Among more serious illnesses are – measles, chicken pox, scarlet fever, mumps, diphtheria, rabies, whooping cough, pneumonia, polio and diabetes.
Children are vaccinated against some illnesses such as typhus, tetanus, chicken pox, whooping cough, tuberculosis, polio. Etc.

Mental disorders
Nervous breakdown, stress, depression, a headache, insomnia, suffer from nerves

Diseases of the blood system
High blood pressure, a heart attack, anemia, leukemia, varicose veins

Skin diseases
Rash, acne, eczema, itch, scratch, pimple, scurvy

Others
Backache, defective hearing, allergy, overweight, asthma, diabetes, malignant tumors, cancer, drug addiction...