which challenges do countries face in limiting the spread of communicable diseases?\nlack of available…

which challenges do countries face in limiting the spread of communicable diseases?\nlack of available healthy food\nincrease of worldwide travel\ndecrease of available clean water\nincrease in migration of infected animals
Answer
Brief Explanations:
- Lack of available healthy food: This mainly affects nutrition and general health but is not a direct challenge in limiting the spread of communicable diseases.
- Increase of worldwide travel: When people travel worldwide, they can carry communicable diseases from one place to another. For example, if a person is infected in one country and travels to another, they can potentially infect people in the new location. This makes it difficult to contain diseases within a specific area.
- Decrease of available clean water: While clean water is important for health, it is more related to water - borne diseases (a subset of communicable diseases) rather than a general challenge for all communicable diseases.
- Increase in migration of infected animals: This is a more specific challenge (related to zoonotic diseases) and not as broad as the increase in worldwide travel which can spread a wide variety of communicable diseases (including those not zoonotic).
Answer:
increase of worldwide travel