Disease can start from different factors that influence our internal balance. These can be things from external influences or internal factors. External influences can be pathogens and internal factors can be genetics.
it is important because they could start finding out the germ that cause a certain disease
no its a symtom that could be caused by a disease
they could not work if they had disease
could be anything depending on the disease.
It can keep you from catching a disease that could kill you. And since you did not get the disease, you will not be giving it to someone else who could die from the disease.
well to start you could get some nice mould growth and a enhanced percent of fungus in your bloodstream, you also might get a disease. xD
Every disease is an illness but not every illness is a disease (A disease is not a virus, parasite, etc but an illness could be)
People with the disease seem to be very inflexible, and start to run slower as the disease becomes worse.
Ebola
It can get a disease from somewhere.
It could but this is not a symptom of the disease.
its not a disease, its a mental condition. You dont just "get it", you develope it.