High Quality Content by WIKIPEDIA articles! Globalization, the flow of information, goods, capital and people across political and geographic boundaries, has also helped to spread some of the deadliest infectious diseases known to humans. The spread of diseases across wide geographic scales has only increased through history. In the current era of globalization the world is more interdependent than at any other time. Efficient and inexpensive transportation has left few places inaccessible, and increased global trade in agricultural products has brought more and more people into contact with animal diseases that have subsequently jumped species barriers (see zoonosis). It is believed that globalization began during the Age of Exploration. An increase in travel also helped spread diseases to natives of land who had not previously been exposed. When a native population is infected with a new disease, where no antibodies have been developed, the disease tends to run rampant within the population.