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One of the studys co-authors, Andy Tatem, said the window to respond to COVID-19 is narrow, highlighting the need to act quickly. We have a narrow window of opportunity globally to respond to this disease and given effective drugs and vaccines are not expected for months, we need to be smart about how we target it using non-drug-related interventions, our findings significantly contribute to an improved understanding of how best to implement measures and tailor them to conditions in different regions of the world.