Answer :
In the Columbian Exchange, an event that happened in both the New World and the Old World was:
- New diseases killed millions in both regions.
During the Columbian Exchange, the transfer of diseases between the Old World (Europe, Africa, and Asia) and the New World (the Americas) had a significant impact. Diseases such as smallpox, measles, and influenza were introduced to the indigenous populations of the Americas, causing devastating epidemics that killed millions of people who had no immunity to these illnesses. Similarly, diseases from the New World, like syphilis, were brought back to Europe, leading to widespread outbreaks and significant mortality rates. This exchange of diseases was one of the major consequences of the Columbian Exchange that affected both regions.
