What agents of transmission have taken the place of nomadic peoples in recent centuries?

People continued to make the transmission of diseases happen, even though that's does not happen mainly by nomadic people's hands anymore. Now, with more integrated economy and faster ways of travel, its way easier for travelling people and the carrier animals transmit disease to more people in vastly different places.

- "bill clinton ( the 42nd u.s. president, served in office from by low unemployment, declining crime rates and a budget surplus. during clinton's second term, the u.s. economy was healthy, unemployment was low and the nation experienced a major technology boom and the rise of the internet."

i just did something on this guy a few days a go give me two minutes to find it in my notes.