  In this paper we find common features between the equations that are used for
pandemic or epidemic modeling and the renormalization group equations that are
used in high energy physics. Some of these features include the relation of
contact matrices in pandemic modeling and operator mixing in the
renormalization group equations. Another common feature are the use of flow
diagrams and the study of fixed points both in pandemic modeling and in
evolution under renormalization group equations. We illustrate these relations
through the study of some cases of interest to the current COVID-19 pandemic.
These include pandemic modeling with mixing between different age groups and
also contact matrices associated with contact between countries. For the final
example we study the effect on mortality of waning from nonspecific vaccines
which are designed to combat different pathogens but nevertheless may lessen
the severity and mortality of COVID-19 infections.
