Answer :
Answer:
• Interviews with sick people.
• Information from doctor’s offices, hospitals, and labs.
• Data from local and state health departments.
• Doing lab tests on spoiled food.
• Trapping mosquitoes in a swamp.
• Interviews with sick people.
• Information from doctor’s offices, hospitals, and labs.
• Data from local and state health departments.
• Doing lab tests on spoiled food.
• Trapping mosquitoes in a swamp.