That is a loaded question and would take a book to explain all the reasons of which I can only name a few examples. Genetic predispostion to certain diseases, lowered immunity, inadequate nutrition to build a healthy immune system, improper medical care, no prenatal care, etc.
Another factor is overprotecting (to an extreme) children so that they are never exposed to normal colds and flu, mumps, measles, chicken pox, etc. Some advocate having chicken pox parties to expose kids to dieseases but that , IMHO, is going a bit too far.
Research has found some interesting links to Asthma, for example. Many children who did not grow up with pets in the house had more asthma than others who did (in general, certainly this is not a rule or anything).
Many children who have Chrones Disease were found to have had extremely sterile home bathroom environments often each child having his/her own bathroom exclusively so that they did not get exposure to other germs in order to build up some defense mechanisms than others who grew up in less rigid environments.
This is what I had read and seen on Health channels and I am only relaying some interesting information.
A predisposing factors is makes the body more susceptible to a disease and may alter the course of the disease.
Hyperthyroidism is not a contagious disease. The stress of disease or pregnancy can sometimes trigger hyperthyroidism in a susceptible individual however.
This person is called a carrier. Some carriers do not show any signs of the disease but others do (as someone with a cold).
A person who harbors a disease is called a carrier. Often, disease do not manifest in the carrier - they manifest in the descendants of the carriers.
A carrier is a person who harbors a disease. They can spread viruses through various forms of contact with other people. Diseases continue to manifest in the descendants of the carriers.Ê
List 5 reason person my be susceptible
Tuberculosis is on the increase due to certain factors: An increase in HIV, makes the person susceptible to diseases especially to TB; people living in poor sanitation areas are infected by TB, as it thrives most in these areas; the most populated areas is where this disease is most prevalent. These factors help in the spread of TB.
the transmission of the causative organism through the environment from the feces of an infected person to the GIT of a susceptible host
It's called a direct transfer transmission. It involves contact of an infected person with a susceptible person and the physical transfer of organisms.
Sorry! This question cannot be answered.
in ur as@
Immune is an adjective, i.e. your immune system. However, it can be used as a noun in the specific case of talking about a person who is not susceptible to a particular disease.
Genes like ApoE4 and other factors are the primary causes for the disease of Alzheimers to develop in a person's body.