how communicable and non communicable disease are spread
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Most are non-infectious, although there are some non-communicable infectious diseases, such as parasitic diseases in which the parasite's life cycle does not include direct host-to-host transmission. ... Risk factors such as a person's background, lifestyle and environment increase the likelihood of certain NCDs.
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A non-communicable disease (NCD) is a disease that is not transmissible directly from one person to another. ... Most are non-infectious, although there are some non-communicable infectious diseases, such as parasitic diseases in which the parasite's life cycle does not include direct host-to-host transmission.
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