Across
- 2. An incurable disease caused by HIV, attacking immune cells.
- 5. Viruses evade these natural protections, like immune responses.
- 7. The process where a virus takes control of a cell to multiply.
- 10. Prevention method involving injections to build immunity.
- 11. Viruses like herpes and papilloma spread through this tract during sexual intercourse.
- 12. flu A highly contagious illness causing nasal congestion and sneezing, but usually no fever.
Down
- 1. Viruses transmitted through contaminated food or beverages affect this system.
- 3. A defense mechanism the body uses against infections, often causing elevated temperature.
- 4. b A viral disease transmitted through blood transfusions or sexual contact, leading to liver damage.
- 6. Viruses enter through breaks in this protective barrier, such as cuts or bites.
- 8. Symptom of hepatitis B involving lack of energy.
- 9. route This route is the most common for viruses to enter the body.