deletions | additions       diff --git a/However_people_who_are_already__.tex b/However_people_who_are_already__.tex  index d78592a..5b117d6 100644  --- a/However_people_who_are_already__.tex  +++ b/However_people_who_are_already__.tex 
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However, people who are already infected may have either recovered or died at this time, meaning they are moved into removed classification. Therefore, the final rate equation for the rate of change of infected individuals is expressed as this:  \begin{equation}  I_{t+1} - I_t = \frac{\mathrm{d} I}{\mathrm{d} t} = \alpha S_t I_t -\beta S_t I_t  \end{equation}