Approximately what proportion of the world's human population has been exposed to TB?Multiple choice question.1 in 101 in 1001 in 1000One-third

To address the question of the proportion of the world's human population that has been exposed to tuberculosis (TB), we can analyze the options presented:

1. Proportion One: 1 in 10 - This indicates that for every 10 people, 1 has been exposed to TB. This would suggest a very high prevalence.

2. Proportion Two: 1 in 100 - This would denote that for every 100 people, 1 has been exposed. While this is slightly less prevalent, it is still significant.

3. Proportion Three: 1 in 1000 - This suggests that TB exposure is relatively rare, with only 1 individual exposed out of every 1000 individuals.

4. Option Four: One-third - This suggests that approximately 33% of the global population has been exposed to TB, which is a substantial figure.

Summary of Information

According to the World Health Organization (WHO), approximately one-third of the world's population is estimated to have been infected with TB bacteria. This means that the exposure rate is significant, aligning with the fourth choice.

Final Answer

One-third