We are all aware that this proclamation suspends the entry into the U.S. of certain H-1B, H-2B, J and L nonimmigrants and their spouses and children.
There are few exceptions and they primarily focus on the national interest of the U.S. including providing medical care or medical research for COVID-19, providing services critical to defense or law enforcement, and providing services that facilitate the economic recovery of the U.S.
Be aware that this proclamation also instructs other actions to be taken to ensure that the presence in the U.S. of H-1B nonimmigrants and those seeking EB-2 or EB-3 benefits do not disadvantage U.S. workers. There are no details provided at this time as to what these actions may be, but speculation abounds that they could include an increase in Department of Labor audits of labor certifications and possibly re-testing of the market for labor certifications.