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10.1. Infectious diseases
A subsection of Biology, 9700, through 10. Infectious diseases
Listing 10 of 208 questions
Malaria and tuberculosis (TB) are two of the most important infectious diseases. Define the term infectious disease. Describe how malaria is passed from an infected person to an uninfected person. shows the worldwide distribution of malaria. Tropic of Cancer Key malaria absent malaria present Tropic of Capricorn Unlike malaria, TB is found across the whole world. Explain why malaria shows the distribution pattern shown in , but TB is found everywhere. Vaccinations are used to control infectious diseases. They were used as part of the programme to eradicate smallpox and as part of the continuing programmes against diseases such as polio and measles. Smallpox was eradicated from the world in the 1970s. Polio is likely to be the next infectious disease to be eradicated. TB and malaria continue to be important diseases. Explain how vaccination provides immunity as an important part of programmes to control and eradicate infectious diseases.
9700_s10_qp_21
THEORY
2010
Paper 2, Variant 1
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Copyright Acknowledgements: © DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY. Measles is an infectious disease, while lung cancer is not. Explain why lung cancer is sometimes referred to as a ‘lifestyle disease’. State the type of pathogen that causes measles and state its mode of transmission. pathogen transmission Between January and April 2011, 118 measles cases were reported in the USA, where measles was previously thought to be virtually eradicated. Suggest a reason for this rise in measles cases.
9700_s13_qp_23
THEORY
2013
Paper 2, Variant 3
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Questions Discovered
208