The heightened border scrutiny stems from a surge in viral transmission across central and eastern Africa, with authorities in Washington imposing a mandatory 21-day quarantine period on arrivals who have visited the Democratic Republic of Congo, Uganda or South Sudan.
The current health emergency was officially declared in mid-May following a severe spike in cases in eastern Congo, where the nation's health ministry has confirmed 9,066 cases and 4,381 deaths, with imported cases recently spreading to Uganda and Kenya.
Emphasising that active collaboration is underway to navigate these statutory constraints and safeguard the welfare of all personnel, the league confirmed: "The NWSL is working with its clubs and U.S. immigration to ensure the players' safe return; all players are in excellent health."