It’s clear that the virus that causes Covid-19 travels freely. It needs no visa, having breached many points of entry. Experts at Imperial College London estimate that “in the absence of interventions, Covid-19 would have resulted in 7 billion infections and 40 million deaths globally this year.” Now is the time for governments to get ahead of the curve and respond to the emergency. It’s time to take a whole-of-government approach to strengthen testing at points of entry and institute mass testing at various points as South Korea did.