Choose the correct answer for each question. The incorrect options are all based on myths many people actually believed (or still do) about infectious disease.
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1.What causes plague?
A rank vapour from decaying matter called 'miasma'
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Sinfulness
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Jews
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The bacterium Yersinia pestis✓
2.How is plague spread?
Via miasma through the air
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Via mangey cats and dogs
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Via flea bites
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Via rat bites
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Fleas carry the plague, and the rats carry the fleas. People thought cats and dogs caused plague, and were paid bounties for killing them. This caused rat numbers to shoot up and worsen the plague.
3.What is the best way to treat plague?
Bloodletting the buboes
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Whipping yourself and praying
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Barricading sufferers in their homes
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Antibiotics
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The other treatments were all widely used throughout Black Death, and only did more harm
4.How is Cholera spread?
Breathing polluted air
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Consuming contaminated water
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John Snow discerned Cholera was water-borne in the 1850s
5.Which of these facts about malaria is true?
If you've had malaria before, you become immune to it
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Malaria is only a problem in Africa
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Children are at low risk from malaria
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The global death rate of malaria is less than 1%
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The pneumonic form of the plague is spread by droplets - therefore "through the air" is a correct answer. Also catching malaria does afford some degree of immunity, which is why it is generally so much more serious in children (8% of child deaths globally caused by malaria). I think that it is unfair to mark these two answers "wrong".
Thanks I'll make the plague one clearer, but it is a common misconception that you automatically become fully immune to malaria if you've had it once which is not the case.