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Use the following data to answer parts (a) and (b) - HSC - SSCE Biology - Question 32 - 2019 - Paper 1
Question 32
Use the following data to answer parts (a) and (b). Dengue fever and malaria are examples of infectious diseases transmitted between humans by mosquitoes. Dengue fe... show full transcript
Worked Solution & Example Answer:Use the following data to answer parts (a) and (b) - HSC - SSCE Biology - Question 32 - 2019 - Paper 1
Step 1
Identify relevant global trends in malaria and dengue fever, based on the data provided
Answer
The data from the provided table shows a marked increase in the global incidence of malaria after 1950, particularly in terms of the population at risk, which rose significantly. Additionally, the number of countries reporting cases has fluctuated. For dengue fever, while specific data is not directly available in the table, it is reasonable to infer from the increasing global population and the changes in malaria data that dengue fever could also be on the rise due to environmental factors.
Step 2
Identify trends in the incidence of malaria and dengue fever
Answer
The incidence of malaria shows a tendency to increase in terms of the population at risk since 1975, with a notable jump between 1992 and 2010. However, the number of countries reporting malaria cases has decreased, suggesting better control measures in some regions. Although the specific incidence of dengue fever is not addressed in the table, the parallel trends in mosquito-borne illnesses indicate a likely increase due to changes in climate and urbanization.
Step 3
Provide a relevant trend
Answer
Overall, the trend indicates that while the global population at risk of malaria has increased, the number of countries with reported cases has decreased, suggesting improved control efforts in certain regions. For dengue fever, increasing global mobility and urbanization likely correlate with rising incidence, and the interaction between environmental factors and vector populations will continue to influence the trends.