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fighting diseases -drugs (defence system (3) hairs and mucus in your nose…
fighting diseases -drugs
there are pros and cons
pros
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big outbreaks of disease called epidemics can be prevented if a large percentage of the population is vaccinated
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defence system
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5) the trachea and bronchi are lined with cilia hair like things which move mucus up to the back of the throat where it can be swallowed.
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