Across
- 3. What virus causes Aids?
- 6. How many people have been globally infected with HIV since 1981?
- 8. What does AIDS stand for?
- 9. What enzyme is present in the virus HIV that copies the viral RNA into DNA?
- 10. What group of viruses does HIV belong to?
Down
- 1. What does HIV stand for?
- 2. What does HIV invade to cause AIDS?
- 4. Give one way in which HIV is transmitted?
- 5. Where did HIV-1 originate?
- 7. What does a retrovirus contain?