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A sickness caused by a virus is called
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When 85-95% of the population is vaccinated against a virus
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infectious disease that spreads rapidly and sickens a large number of people
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As the number of people in the population that are immune to the disease increased the number of people in the population who became sick/ill will
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As the number of people in the population that were originally infected increased the number of people in the population who became sick/ill will (increase or decrease)
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A harmless dead or weakened virus/bacteria that stimulates a person's immune system to mount defenses against the virus/bacteria
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When a virus/bacteria cannot cause a person to become sick. You are considered __________ to this virus/bacteria
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A sub-microscopic particle that must infect living plant or animal cells to reproduce
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We do not have medicine for every viral disease. So, to build up your immune system to fight that virus you can either get a vaccine or get _______ and hopefully recover healthily to build up your immunity by recovering.
