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Hi, everyone, and welcome
to our second module.

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I hope that everything
is going well so far

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and that you're learning
how to navigate this course.

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If you are running into any difficulties

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with logistics or content,

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please don't hesitate to reach out to me.

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That's why I'm here,

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and this is definitely not the
time to start getting behind.

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In this module, we're going
to expand on what we did

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in the last module about
disease transmission

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to talk about measures
of disease frequency.

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This is how we quantify the development

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and burden of disease in our populations.

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It is very important stuff

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because the incidence, prevalence,

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and mortality measures we learn about

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in this module are going to take us

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through the whole rest of the semester

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as we look at risk in
different populations,

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You'll find this is
also incredibly relevant

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and important in public
health practice as well.

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This module is very large
in terms of content,

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so please give yourself plenty of time

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to absorb the learning material,

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especially before
starting the problem set.

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This is probably the longest
module in the course,

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so don't feel discouraged

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and know that modules

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that follow this will likely be shorter.

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If you have any questions,

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please don't hesitate to reach out.

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I'm happy to work out any questions,

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either by email, a virtual meeting,

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or Yellowdig discussion.

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Take care.