We're seeing cases of human transmission that aren't from returning travel, that are just happening in the community, and we're seeing people infected with COVID-19 when we don't even know where the infection came from.
Estamos viendo casos de transmisión humana que no provienen de viajeros, que ocurren en la comunidad. Y vemos personas infectadas con COVID-19 sin saber ni siquiera  de dónde surgió la infección.