If transmission takes place in large part via particles small enough to hang in the air, however, both superspreaders and increased indoor transmission risk make a great deal of sense. Two people six feet apart, no matter the setting, are largely safe from one another’s ballistic droplets. In addition to those droplets, however, each of them will also exhale a gradually growing and expanding cloud of aerosols, which given enough time in an unventilated room will spread throughout the space. If viruses can be carried by vapor that small, then the longer an infected person and uninfected people share the same space, the greater number of particles will be transmitted and the greater the infection risk grows. Give it enough time in a small enough space with enough other people around, and presto—you’ve got your superspreader event.