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informal, local knowledge that has been built up over the centuries by the people who live in a...
any disease that is caused by a virus or a bacterium or any other micro-organism.
the main vein that returns deoxygenated blood from the lower parts of the body to the right...
a response of the body tissues to injury or irritation. It causes pain, swelling, redness and...
a viral disease of birds and mammals commonly called the flu.
compounds that consist of any combination of elements, but do not usually contain carbon and...