Materials

■ safety goggles

■ disposable gloves

■ dropper bottle of unknown solution

■ indophenol indicator

Background

1. What are the five main ways that human diseases can be transmitted?

2. How does a cold or flu spread from person to person?

3. How does the body fight invading viruses?

4. Why has the transmission of HIV become a great concern worldwide?

5. Why is a person with AIDS less able to combat infections than a person who does not have AIDS?

i7AniiA Simulating the Transmission of a Disease

1. This investigation will involve the class in a simulation of disease transmission. After the simulation, you will try to identify the original infected person in the closed class population.

2. In your lab report, construct a data table similar to Table A.

3. ^^ ^ CAUTION Put on a lab apron, ^r ^r goggles, and disposable gloves.

4. CAUTION If you get any solution used in this investigation on your skin or clothing, wash it off at the sink while calling to your

TABLE A LIST OF PARTNERS' NAMES

Round number

Partner's name

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