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As the human population grows, people are moving from rural to urban areas. This increased urbanization around the world is linked to an increase in infectious diseases.

Which of the following is the BEST statement about the relationship between urbanization and infectious disease?


The air and water pollution associated with urban areas increases the rate of lung and intestinal diseases.


The high population density increases the rate at which diseases spread throughout the city.


Poor sanitation leads to the rapid growth and spread of viruses and bacteria.


Urban areas have slums with high population densities, poor sanitation, and poor health care.​


Smog and ozone alert days increase asthma and heart disease.

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