deletions | additions       diff --git a/However_people_who_are_already__.tex b/However_people_who_are_already__.tex  index 2b867c9..5fa07f5 100644  --- a/However_people_who_are_already__.tex  +++ b/However_people_who_are_already__.tex 
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\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}  where \beta $\beta$  is the rate constant for the percentage of the population moving from infected to removed per unit time. \\Finally, the equation of the rate of individuals moving becoming removed (i.e. the rate of people who recover per unit time) is simply individuals who have recovered or died. This may be expressed as below:  \begin{equation}  R_{t+1} - R_t = \frac{\mathrm{d} R}{\mathrm{d} t} = \beta S_t I_t