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2 (a) Chlamydia is caused by a pathogen - Edexcel - GCSE Biology Combined Science - Question 2 - 2019 - Paper 1
Question 2
2 (a) Chlamydia is caused by a pathogen. (i) Chlamydia is transmitted by: A insect vectors B sneezing C sexual intercourse D contaminated food (ii) The ty... show full transcript
Worked Solution & Example Answer:2 (a) Chlamydia is caused by a pathogen - Edexcel - GCSE Biology Combined Science - Question 2 - 2019 - Paper 1
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Describe the trend in the number of cases of chlamydia between 1996 and 2013.
Answer
From 1996 to around 2002, the number of cases of chlamydia increased gradually. After that point, there was a general fluctuation but the overall trend was an increase, peaking around 2012 before leveling off slightly in 2013.
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Calculate the number of people with chlamydia in 2013.
Answer
To find the number of people with chlamydia in 2013, use the formula:
Number of cases = (Cases per 100,000) * (Population) / 100,000
Thus, the calculation is:
Number of cases = (1,200) * (64,000,000) / 100,000 = 768,000.
Therefore, approximately 768,000 people had chlamydia in the UK in 2013.