What modern amenity could help another outbreak similar to the plague due to its ability to transport people in short amounts of time (one incubation period?

Air travel is a modern amenity that could facilitate the rapid spread of a disease similar to the plague. With the ability to transport people across vast distances in just a few hours, an infectious agent could spread globally within one incubation period. This rapid movement of individuals could lead to widespread outbreaks before adequate containment measures are implemented. Enhanced connectivity thus poses a significant challenge in managing and controlling potential pandemics.