Ruth Bader Ginsburg was missing from oral arguments at the US Supreme Court on Wednesday morning after contracting a stomach virus.

Chief Justice John Roberts announced that the court's oldest justice, at 86 years old, was "indisposed due to an illness" but would be following the week's cases by reading briefs from home. It's the second time within the past year that she has missed arguments due to an illness.

Her absence last December marked the first time in her 26 years on the bench that she had missed an argument.

The court's leading liberal on the bench, Ms Ginsburg and liberal and moderate justices are outnumbered 5-4 by conservative justices after the president's appointments of Neil Gorsuch and Brett Kavanaugh to the nation's highest court.

Ms Ginsburg appeared in court on Tuesday to hear oral arguments over the president's attempt to end the Deferred Action for Childhood Arrivals programme, or DACA, which has allowed more than 80,000 young people to legally remain in the country after entering the country as children with their undocumented families.

13 of Ruth Bader Ginsburg's most inspirational quotes Show all 13 1 /13 13 of Ruth Bader Ginsburg's most inspirational quotes 13 of Ruth Bader Ginsburg's most inspirational quotes On feminism 'Feminism … I think the simplest explanation, and one that captures the idea, is a song that Marlo Thomas sang, 'Free to be You and Me.' Free to be, if you were a girl—doctor, lawyer, Indian chief. Anything you want to be. And if you’re a boy, and you like teaching, you like nursing, you would like to have a doll, that’s OK too. That notion that we should each be free to develop our own talents, whatever they may be, and not be held back by artificial barriers - manmade barriers, certainly not heaven sent.' (Interview with Makers, 2012) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On how she wants to be remembered 'Someone who used whatever talent she had to do her work to the very best of her ability. And to help repair tears in her society, to make things a little better through the use of whatever ability she has. To do something, as my colleague David Souter would say, outside myself. ‘Cause I’ve gotten much more satisfaction for the things that I’ve done for which I was not paid.' (Interview with MSNBC, 2015) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On the advice she'd give women today 'Fight for the things that you care about. But do it in a way that will lead others to join you.' (Speech at Harvard University's 364th Commencement, 2015) AFP/Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On women being included in the conversation 'Women belong in all places where decisions are being made. I don't say [the split] should be 50-50. It could be 60 per cent men, 40 per cent women, or the other way around. It shouldn't be that women are the exception.' (Interview with USA Today, 2009) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On how she copes with criticism 'Well, I’m dejected, but only momentarily, when I can’t get the fifth vote for something I think is very important. But then you go on to the next challenge and you give it your all. You know that these important issues are not going to go away. They are going to come back again and again. There’ll be another time, another day.' (Interview with ABC News Correspondent Lynn Sherr, 2000) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On women's rights 'Women's rights are an essential part of the overall human rights agenda, trained on the equal dignity and ability to live in freedom all people should enjoy.' (ACLU) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On rejection 'You think about what would have happened ... Suppose I had gotten a job as a permanent associate. Probably I would have climbed up the ladder and today I would be a retired partner. So often in life, things that you regard as an impediment turn out to be great good fortune.' (Interview with Makers, 2012) AFP/Getty 13 of Ruth Bader Ginsburg's most inspirational quotes On the biggest issue women face 'In some ways it’s the most familiar issue and the largest one. It’s, “Who will take the responsibility for bringing up the next generation?” That, I think, is the hardest problem. There can be incentives and encouragement, but women will have achieved true equality when men share with them the responsibility of bringing up the next generation.' (Interview with ABC News Correspondent Lynn Sherr, 2000) AFP/Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On sexist, unconscious bias 'I think unconscious bias is one of the hardest things to get at. My favorite example is the symphony orchestra. When I was growing up, there were no women in orchestras. Auditioners thought they could tell the difference between a woman playing and a man. Some intelligent person devised a simple solution: Drop a curtain between the auditioners and the people trying out. And, lo and behold, women began to get jobs in symphony orchestras.' (Interview with Elle magazine, 2014) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On having a supportive partner 'If you have a caring life partner, you help the other person when that person needs it. I had a life partner who thought my work was as important as his, and I think that made all the difference for me.' (Interview with Yahoo, 2014) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On how many women should be on the Supreme Court 'People ask me sometimes, when — when do you think it will it be enough? When will there be enough women on the court? And my answer is when there are nine.' (Talk at Georgetown University, Washington, 2015) (There are nine judges on the US Supreme Court) AFP/Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On the impact of discrimination 'We should not be held back from pursuing our full talents, from contributing what we could contribute to the society, because we fit into a certain mold ― because we belong to a group that historically has been the object of discrimination.' (Interview with ABC News Correspondent Lynn Sherr, 2000) Getty Images 13 of Ruth Bader Ginsburg's most inspirational quotes On her most treasured talent 'If I had any talent in the world, any talent that God could give me, I would be a great diva.' (Talk at Georgetown University, Washington, 2015) AFP/Getty Images

The court's five conservative justices could rule in favour of the Trump administration and argue that the Department of Homeland Security was allowed to end the programme in 2017.

Her absence from Wednesday's proceedings means she'll miss a Wednesday conference to discuss yesterday's hearing, including the DACA case. During Tuesday's proceedings, Ms Ginsburg had argued to a White House attorney that ending the programme would probably be unconstitutional, pointing to a Homeland Security memo that is "infected by the idea" of its illegality and "leaves substantial doubt about its illegality".

The Supreme Court could hear a number of high-profile cases this term that could potentially hand the administration and Republicans a number of victories in controversial cases, from anti-immigration policy to anti-abortion measures and efforts to strengthen Second Amendment protections.

Not yet scheduled this term are hearings to determine whether Louisiana can require physicians who perform abortions to have admitting privileges at a local hospital.

A four-time cancer survivor, Ms Ginsburg has faced a number of medical issues within the last year.

In August, she announced a procedure for a localised malignant tumour in her pancreas.

Last December, she had two cancerous nodes removed from her left lung.