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Discussion Paper
Does the BCG Vaccine Protect Against Coronavirus? Applying an Economist’s Toolkit to a Medical Question
As COVID-19 has spread across the globe, there is an intense search for treatments and vaccines, with numerous trials running in multiple countries. Several observers and prominent news outlets have noticed that countries still administering an old vaccine against tuberculosis—the Bacillus Calmette-Guérin (BCG) vaccine—have had fewer coronavirus cases and fewer deaths per capita in the early stages of the outbreak. But is that correlation really strong evidence that the BCG vaccine provides some defense against COVID-19? In this post, we look at the incidence of coronavirus cases along ...
Report
The Spread of COVID-19 and the BCG Vaccine: A Natural Experiment in Reunified Germany
As COVID-19 has spread across the globe, several observers noticed that countries still administering an old vaccine against tuberculosis—the BCG vaccine—have had fewer COVID-19 cases and deaths per capita in the early stages of the outbreak. This paper uses a geographic regression discontinuity analysis to study whether and how COVID-19 prevalence changes discontinuously at the old border between West Germany and East Germany. The border used to separate two countries with very different vaccination policies during the Cold War era. We provide formal evidence that there is indeed a ...