Outbreak!: How Does an Infectious Disease Spread?

Introduction:

An infectious disease is any disease caused by germs that can be spread from one person to another.

What are some infectious diseases?

What are some diseases that are not infectious?

Today we have ______students in class.  Estimate how many people you think will be infected after 3 interactions if only one person starts with the disease:  ________

Wait for your teacher instructions, bring this sheet with you and record your contacts.

 Contact #1 Contact #2 Contact #3

Record the data from each infected student with three interactions.  Your teacher will write on the doc cam, copy the data and try to figure out who the original carrier was.

 Infected Student Name Contact #1 Contact #2 Contact #3

After reviewing the data, I think _______________________ was the initial carrier.

After collecting data, wash your cup out at least 5 times, fill ¼ full of water and return to cart.

We are now going to have 5 interactions.  Estimate how many people will end up with the disease_____.

 Contact #1 Contact #2 Contact #3 Contact #4 Contact #5

 Infected Student Name Contact #1 Contact #2 Contact #3 Contact #4 Contact #5

Summary:

1. Using the data collected in the table above, try to determine who the original carrier of the disease was.  If you are unable to do so, can you limit it down to a couple of classmates?  What additional information would be needed to determine the source?

1. How many people do you think would be infected if you had ten interactions? ________

After the tenth interaction, would the rate of increase in the number of infected people become faster or slower?  Explain why.

1. What are some ways that infectious diseases are transmitted from one person to another?

1. What are some ways you can prevent the spread of an infectious disease?

1. Our simulation showed the way a disease could spread if the spread of disease depends on person-to-person contact.  Examples of this kind of disease include pink eye, chickenpox and herpes (cold sores).  Other diseases, such as smallpox and tuberculosis, can be spread by germs in the air.  How might the spread of these diseases differ from the spread of diseases that depend on person-to-person contact?

1.  Challenge Question: The spread of the disease in our simulation was very rapid.  Multiple people were infected within a few minutes.  In real life, infections do not spread as rapidly as in this simulation.  Why is the spread of infections slower in real life?

Assessment:

Please see your teacher’s website for explanation of proficiency level for each standard

 Life Skills Meets Proficiency Nearly Proficient Not Proficient