Answer Happy

3. Identifying the source is much harder in a real epidemic Why would it be harder in the real world than in our class demo? What are some complicating factors? 4. What do you think would happen to the incidence of chlamydia in our class if there were two original infections instead of 1? How about 102

6. There is a concept in epidemiology called ID50. This is the infective dose, which is the amount of the pathogen which will Cause infection in a majority of susceptible individuals. If the ID50 for Chlamydia trachomatis is 1,000 IFU (infectious unit, in this case 1,000 Chlamydia trachomatis bacteria). What do you think happens to your chance of infection if you are exposed to more than 1,000 IFU? How about less? How do you think this translates over to the real world? 7 What are some possible ways to reduce the chance of infection with chlamydia, even if you are exposed? 8. We don't have a vaccine to protect against chlamydia infections, but if we did, how would it affect the transmission (and therefore incidence) of Chlamydia in our class if 2 people (out of approximately 25) were vaccinated? How about if 10 people were vaccinated? How about if 20 people were vaccinated?

have 1 infected person). Remember to title the graph and label all the axes property data to graph the progress of infection. Assume each round represents Chlamydia trachomatic infection growth 8 G rossed papafur 4 Week RA R2 R3 tected