 Thus, reductions in travel and the speed at which communities take action can play decisive roles in stopping the outbreak. The analysis suggests that for the coronavirus to be eliminated, it is not necessary to impose aggressive social distancing measures all over the world at once, but rather only in communities in which active spreading is detected. The sooner such measures are imposed, the shorter the duration they must remain in place. Ifinfected communities (including those that become re-infected in the future) are quick enough to act , the number of actively infected communities ( and thus the number of communities in which such measures are required ) will exponentially decrease over time  .
<clarity>  Thus, reductions in travel and the speed at which communities take action can play decisive roles in stopping the outbreak. The analysis suggests that for the coronavirus to be eliminated, it is not necessary to impose aggressive social distancing measures all over the world at once, but rather only in communities in which active spreading is detected. The sooner such measures are imposed, the shorter the duration they must remain in place. Ifinfected communities (including those that become re-infected in the future) are quick enough to act , the number of actively infected communities ( and thus the number of communities in which such measures are required ) will exponentially decrease over time  .
 Thus, reductions in travel and the speed at which communities take action can play decisive roles in whether COVID-19 is eliminated from a collection of regions. If, on average, infected regions (including those that become re-infected in the future) are quick enough to act , the number of actively infected communities ( and thus the number of communities in which such measures are required ) will exponentially decrease over time .