Answer:
40%.
Explanation:
The sew water contains infectious bacteria and virus that may cause infections like irritation, skin allergy and problem in breathing. Vibrio vulnificus is the bacteria present in water that mainly responsible for these infection.
Most of the people in the United State get infected by swimming in the sea water. According to the most recent survey, the population that are contaminated by infectious bacteria and virus is nearly 40%. Less than half of the populations shows sea water contaminated infections.
Thus, the correct answer is 40%.