A statement from the governing body read: "The availability and efficacy of vaccines have substantially changed (the) situation, with fully vaccinated players no longer required to isolate as close contacts and the risk of transmission and severity of illness being reduced for those who are vaccinated. "Absolutely gutted but I've been here before," Mills tweeted. "If you come off the pitch and you're not feeling right, just put your hands up and there is nothing wrong with that. You might upset a coach or a team-mate for a game or so, but in the long run, you've got a long career ahead of you and even longer life. "But we played some decent stuff as well and hopefully it was a decent game for the people watching. Every time we play it seems to be a bigger occasion, and it's a great thing to be part of."