As many anxiously await their turn to be vaccinated against COVID-19, the state of Missouri recently announced the opening of another tier of eligible individuals effective March 15. That tier is defined as those working in what the state is calling “critical infrastructure,” or those who preserve the essential functions of society. State officials are quick to note that this next phase will exacerbate the vaccine shortage in some areas, as there will be more eligible individuals added to rosters than there are vaccine doses available. However, Missouri has seen a slight increase in the numbers of doses slated for distribution through the month of March.