Scale the number of susceptibles in the passed Links
by the passed scale ratio. This can be a value, e.g.
ratio = 2.0 will scale the total number of susceptibles
by 2.0. This can also be lists of values,
where ward[i] will be scaled by ratio[i]. They can also
be dictionaries, e.g. ward[i] scaled by ratio[i]
ratio (None, float, list or dict) – The amount by which to scale the total population of
susceptibles - evenly scales the work and play populations