The COVID-19 pandemic affects all countries, but how governments respond is dictated by politics. Amid this, the World Health Organization (WHO) has tried to coordinate advice to states and offer ongoing management of the outbreak. Given the political drivers of COVID-19, we argue this is an important moment to advance International Relations knowledge as a necessary and distinctive method for inclusion in the WHO repertoire of knowledge inputs for epidemic control. Historical efforts to assert technical expertise over politics is redundant and outdated: the WHO has always been politicized by member states. We suggest WHO needs to embrace the politics and engage foreign policy and diplomatic expertise. We suggest practical examples of the entry points where International Relations methods can inform public health decision-making and technical policy coordination. We write this as a primer for those working in response to COVID-19 in WHO, multilateral organizations, donor financing departments, governments and international non-governmental organizations, to embrace political analysis rather than shy away from it. Coordinated political cooperation is vital to overcome COVID-19.