From the US Embassy website in Dublin
Q: Can I travel to the United States? What does the travel order (Presidential Proclamation 9996) mean?
Entry of foreign nationals who were physically present within the following list of countries within 14 days prior to their entry or attempted entry into the United States is suspended, per Presidential Proclamations 9984, 9992, 9993, 9996 and the subsequent proclamation issued May 24, 2020:
Brazil; The United Kingdom of Great Britain and Northern Ireland, excluding overseas territories outside of Europe; The Republic of Ireland; The 26 countries that comprise the Schengen Area (Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, and Switzerland); The Islamic Republic of Iran; The People’s Republic of China.
Please click here to review Presidential Proclamation 9996 in full for detailed information.
The travel restriction does not apply to American citizens, legal permanent residents, most immediate family members of U.S. citizens, and other individuals who are identified in Presidential Proclamation 9996. The Department of Homeland Security will direct those who have been in the Schengen Area who are exempt from these restrictions, including American citizens, to travel through select airports where the U.S. Government has implemented enhanced screening procedures. Travelers are advised to visit
the Department of Homeland Security’s website for further guidance on U.S. travel restrictions.