Why do you think pandemics became a worldwide issue starting in the 1900’s?

Pandemics became a worldwide issue starting in the 1900s because we began to travel around the world much faster. Around this time we began to perfect travel across the sea by boat and air, which allowed disease to be spread much faster.

Explanation:

i believe it would be a single seller : )

this is false

richard nixon was the 37th president of the united state and didn't serve as a vice president for any president before him