Cervical cancer campaigner Vicky Phelan has died at the age of 48.
The Limerick woman passed away at Milford Hospice in Limerick in the early hours of this morning.
Ms Phelan was first diagnosed with cervical cancer in 2014.
An internal CervicalCheck audit found that despite her routine smear in 2011 being reported as clear of abnormalities, it actually showed she had cancer three years before her diagnosis.
She wasn't told about the mistake until 2017.
In April 2018, she blew the lid off the CervicalCheck scandal by refusing to sign a non-disclosure agreement in her case against the US lab that misread her smear.
The HSE later confirmed that more than 200 women had developed cervical cancer after having a misdiagnosed CervicalCheck smear test.
Vicky was awarded an Honorary Doctorate from the University of Limerick in 2018 and published a memoir, 'Overcoming' in 2019, which won the An Post Irish Book of the Year award.
She is survived by her husband Jim, and two children Amelia and Darragh.
Last month, fellow campaigner Lynsey Bennett passed away at the age of 34.
