A health authority compared two programmes in areas with equal populations and similar age structures. At the start and after two years, 1000 randomly selected people aged 16 to 35 in each area were tested for chlamydia. The authority also estimated the number of new HIV infections among people aged 16 to 35 in each area in the year before the programme started and in the second year of the programme.
| Programme | Measures provided | Chlamydia positive at start, per 1000 tested | Chlamydia positive after two years, per 1000 tested | New HIV infections in the year before the programme, per 10 000 people | New HIV infections in the second year of the programme, per 10 000 people |
|---|---|---|---|---|---|
| P | condoms | 86 | 64 | 14 | 11 |
| Q | condoms; regular testing; partner notification; antibiotics for chlamydia; antiretroviral treatment for HIV; sterile needles | 83 | 27 | 15 | 5 |
Explain whether the evidence justifies introducing programme Q in other areas.
Use the information in the table and your knowledge of chlamydia and HIV transmission in your answer.
112 exam-style questions on Edexcel GCSE Biology 5.1 Health and communicable disease, covering 5.1.1 Communicable and non-communicable diseases, 5.1.2 Disease susceptibility interactions, 5.1.3 Pathogens as disease-causing organisms, 5.1.4 Common infections, 5.1.5 Spread and prevention of pathogens, 5.1.6 Lifecycle of a virus, and 5.1.7 Spread and prevention of STIs. Each one has a worked solution and a mark scheme showing where the marks go.