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USUALLY the disease is new to the population, so they have not built antibodies specifically to fight it yet; and/or the people are so malnourished (protein and/or kcalorie deficiency, either acute or chronic) that their bodies (immune systems) are too weak to produce antibodies.
What else can I help you with?
What will to the organism?
it will spread out, and can cause diseases.
Do personality factors cause diseases?
yes
What pathogens cause diseases that are often spread through water?
A Protozoa
How are noninfectious diseases caused?
Noninfectious diseases are caused by factors such as genetics, lifestyle choices (e.g. diet, exercise, smoking), environmental factors (e.g. pollution, radiation), and aging. These diseases develop over time and are not spread from person to person like infectious diseases. Examples of noninfectious diseases include heart disease, cancer, and diabetes.
What did poor water and sewage systems cause in the late 1800s?
contagious diseases spread
Which diseases do they spread?
Everything can spread diseases. What, 'which' are you concerned about?
What contributed to spread of diseases in the US Civil War?
During the US Civil War, diseases were the cause of more deaths than gun fire. The spread of diseases was due to unsanitary conditions and the lack of modern day antibiotics.
Were middle age diseases spread by insects?
Fleas spread the plague, mosquitoes spread various diseases ( still do). A lot of disease was caused by bad water with water born bacteria and pollution. The cause of cholera is bad water ( still is).
How are most diseases usually spread?
Most diseases are spread by germs.
How is a non infectious disease different from a infectious disease?
Infectious diseases are those diseases which are caused by infectious agents (which include microorganisms such as bacteria, fungi, protozoa and virus, as well as some multicellular animals such as worms) and hence they are the ones which can spread from one person to another. Non-infectious diseases are those diseases that are not caused by infectious agents and do not spread from one person to another.
Can kissing cause illnesses?
Kissing does not 'cause' illness. Kissing can spread diseases, which include colds, mononucleosis, flu and other virus and bacteria born illnesses. The exchange of bodily fluids of any type (Blood, saliva, semen and mucous) can spread serious diseases.
What are 3 effects of river flooding?
it can cause damage to our house and property. it can spread diseases it can spoil crops
