Researchers examine the health records of 400 women with HIV and their babies. The women received the same other healthcare, and none of the babies was breastfed.
| Treatment received | Number of babies born | Number of babies later diagnosed with HIV |
|---|---|---|
| No antiretroviral treatment during pregnancy or birth | 200 | 30 |
| Antiretroviral treatment during pregnancy and birth | 200 | 4 |
A student claims that antiretroviral treatment completely prevents mother-to-baby transmission because it removes HIV from the mother's body.
Evaluate the student's claim. Use the information in the table and your knowledge of antiretroviral treatment.
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.