Americans returning from europe to self quarantine ―pence
You're referring to the statement made by Mike Pence, the Vice President of the United States, on March 12, 2020.
During a press briefing, Pence announced that the US government would be implementing a new policy requiring Americans who had recently traveled to Europe to self-quarantine for 14 days upon their return to the United States.
Pence stated: "We're taking a new step today to protect the American people. We're asking all Americans who have traveled to Europe in the last 14 days to self-quarantine for 14 days. This is a precautionary measure to ensure that we're doing everything we can to prevent the spread of the virus."
This announcement was made in response to the growing number of COVID-19 cases in Europe and the increasing risk of transmission to the US. The self-quarantine measure was intended to help slow the spread of the virus and prevent further outbreaks in the US.
It's worth noting that this policy was later expanded to include travelers from other countries, including China, South Korea, and Japan, as the pandemic continued to spread globally.