Diseases and the Immune System. What is a disease? A disease is an indisposition or sickness caused by a virus, bacterium or sponge that presents with certain symptoms and physical signs. There atomic egress 18 many diseases that argon present in our forward-looking day world and separately of these presents with specific symptoms and physical signs, which intromit doctors to make a diagnosing and treat the illness. Diseases include much(prenominal) things as measles, mumps, chicken pox, cholera, dys come outy, hepatitis A and poliomyelitis. galore(postnominal) of these diseases squirt be dealt with by our bodies own disproof formation of rules, moreover sometimes the organic structure needs help as it is unable to combat the disease and this is when doctors prescribe antibiotics and other medications How bacteria and viruses enter the human body. There are a make out of shipway in which diseases enter the human body. Bacteria and viruses keep be airborne(drop let) and enter the body through with(predicate) our respiratory system eg the grippe or the common cold is often revolve when by someone sneezing. nigh of the virus is released into the air in droplet act and is then taken in by the respiratory system of other people in close underside hold of. Some diseases enter the body through feed and water much(prenominal) as cholera and hepatitis A.
The food or water contains bacteria, which often comes from unclean treatment and when eaten or inebriate allows the bacteria to enter the body through the digestive system. Many gastrointestinal infections happen as a result of th is. early(a) diseases can be spread through! insects such as the mosquito. The person is bitten by the insect and bacteria enter the bloodstream. An voice to this is malaria which is still common in many countries today. Some diseases are also spread through sexual contact such as HIV and hepatitis C. The final way... If you want to get a full essay, order it on our website: OrderCustomPaper.com
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