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Public health
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Plasmodium multiplies in the mosquito and accumulates in its salivary glands before being injected during a blood meal. This is an example of:
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Diseases that can spread between humans by touch, without an intervening vector or vehicle, are called:
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An illness due to a specific infectious agent or its toxic products, arising through transmission of that agent from an infected person, animal or reservoir to a susceptible host, directly or indirectly, is called:
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A man catches influenza again after a few years, although he recovered from it before. Which property of the agent best explains this?
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A patient acquires hepatitis C virus from a contaminated blood transfusion. The blood acts as a:
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A primary case of chickenpox is in a household with 8 susceptible contacts. Within one incubation period, 2 of them become ill. What is the secondary attack rate?
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Staphylococcus aureus can cause a skin infection, a urogenital infection or pneumonia depending on where it enters the body. This shows that it:
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In an entirely susceptible class, each case infects on average 4 others (R0 = 4). If 5 cases are introduced, how many new infections are expected in the first generation?
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Why may a mildly ill person who keeps going to work and to the clinic be epidemiologically more important than a severely ill patient?
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Hepatitis A spreads through contaminated food handled by an infected person. Which statement about the reservoir and the infection source is correct?
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