For certain diseases, tracing individuals who have had contact with infected people is one of the most effective ways to prevent and control them. Which disease would benefit from tracing the contacts of infected people for its prevention and control?
- ACholera, as it can be treated successfully with carefully selected antibiotics.
- BMalaria, as it is transmitted by animals, so the transmission cycle of the pathogen can be broken.
- CMeasles, as it can cause an epidemic and can be controlled by other methods.
- DSickle cell anaemia, as it is genetically inherited, so there is time to act before more individuals are affected.