A-LevelBiologyInfectious diseases9700/12 · May/June 2023 · Q391 Mark
The average sizes of some pathogens are shown. [Figure 39.1] One type of air filter has been shown to be effective at preventing any pathogens of 1 µm or larger from entering the air system of a room. Based on their size and mode of transmission, which diseases would the air filter prevent from entering the air system of a room?
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AHIV infection (not prevented), TB (prevented), malaria (prevented), cholera (prevented)
BHIV infection (not prevented), TB (not prevented), malaria (prevented), cholera (prevented)
CHIV infection (prevented), TB (not prevented), malaria (not prevented), cholera (not prevented)
DHIV infection (not prevented), TB (prevented), malaria (not prevented), cholera (not prevented)
✓ Correct answer
D: HIV infection (not prevented), TB (prevented), malaria (not prevented), cholera (not prevented)
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