US Soccer has said it is "looking into" the incident that led to star striker Alex Morgan contracting coronavirus.
London 2012 Olympic champion and two-time FIFA Women's World Cup winner Morgan and her family tested positive for COVID-19 over the Christmas holidays.
The 31-year-old was subsequently left out of the squad for a training camp and two friendly matches against Colombia this month.
"We are all in good spirits and recovering well," Morgan posted on social media.
"After our isolation is completed, I will follow US Soccer's return to play guidelines to ensure my body is fully recovered and I can join my team-mates back on the field soon."
US women's national team head coach Vlatko Andonovski suggested the situation would be investigated after photos emerged on social media of Morgan and several family members congregating in California for Christmas.
This was despite advice in the United States to reduce travel and meeting in large groups to prevent the spread of COVID-19.
"I’m sure our chief medical officer George [Chiampas] and the medical staff are looking into this incident with Alex, and we’ll try to correct it if there’s anything that needs to be corrected going forward," Andonovski said, according to Goal.
"Personally I’ve talked to Alex numerous times now and I’m glad that herself and her family are doing well.
"Slowly but surely they’re putting everything behind them and handling the virus very well."
Morgan recently returned to the US after a short stint at Tottenham Hotspur in the Women's Super League, joining the English club just four months after giving birth to her first child.
Much of her time at Tottenham was spent regaining fitness but she made five appearances and scored twice.
She is now set to rejoin National Women's Soccer League side Orlando Pride for the 2021 season.
Morgan has represented the US 170 times and scored 107 goals, playing an integral part of the team that earned an Olympic gold in 2012 and world titles in 2015 and 2019.
She also competed at the Rio 2016 Olympic Games, where the US lost at the quarter-final stage.