Maleficent Comrades: War in Ukraine and COVID-19.

Infectious diseases and war are maleficent comrades. This reality applies equally well to the war in Ukraine and the current coronavirus disease 2019 (COVID-19) pandemic. Europe is facing a huge refugee crisis and potentially the conflict could worsen the COVID-19 pandemic. Initially, 2 major countries of concern are Poland, which has taken the majority of refugees, and Moldova, which has taken a very large number of refugees on a per capita basis. However, the concern extends to the rest of Europe because of the mobility of refugees beyond the first country they enter. Vaccinating, infection control, and boosting refugees should be a priority. However, complete prevention of COVID-19 is very complex because of other issues related to the success of prevention.