President Trump has extended Proclamation 10052 and Proclamation 10014 which were set to expire on December 31, 2020. Both Proclamations have been extended until March 31, 2021 and may be extended further.
Proclamation 10052 restricts the issuance of certain nonimmigrant visas such as H-1B, H-2B, L-1, and certain J-1 statuses, including those for dependents. The full text of the original Proclamation can be found here: https://www.whitehouse.gov/presidential-actions/proclamation-suspending-entry-aliens-present-risk-u-s-labor-market-following-coronavirus-outbreak/.
Proclamation 10014 bans issuance of certain immigrant visas (green cards for applicants processing from outside of the U.S.). The full text of the original Proclamation can be found here: https://www.whitehouse.gov/presidential-actions/proclamation-suspending-entry-immigrants-present-risk-u-s-labor-market-economic-recovery-following-covid-19-outbreak/
Limited exceptions to both Proclamations remain available and are granted at the discretion of the U.S. Consulate/Embassy abroad and/or U.S. Customs and Border Protection.