Harris took to Twitter on Saturday to share the news of the repeat tests on offer, which, according to him, will be paid for by the State.
In a statement the HSE said it wished to acknowledge Professor Flannelly and to formally thank her for the enormous dedication, contribution and expert knowledge that she brought to the CervicalCheck Programme over the past 12 years.
"I would like this evening to announce that I have taken a decision to stand aside from my role as Clinical Director of CervicalCheck with immediate effect".
On Thursday the HSE said that since 2008, a total 1,482 cases of cervical cancer have been notified to the CervicalCheck programme.
Asked if any of the women had died, she said: "This is not information kept by CervicalCheck".
The court was told that CervicalCheck informed Ms Phelan's consultant about the mistake in 2016 but there was a further delay until 2017 before she was told.
In January, she was given between six and twelve months to live and she, along with her husband Jim, sued the lab and the HSE.
StormTrack Weather: Warm temps. return for weekend
Wednesday a few severe storms will be possible across the Concho Valley before more widespread storm chances Thursday and Friday . It's not out of the question that a brief rain or snow shower could even be seen in the northern tier of the Poconos.
Ms Phelan, who waited three years to learn CervicalCheck had an internal report on her misdiagnosis, said: "The fact the head of the national screening programme could not say this morning that these women had been communicated with to me is absolutely disgraceful".
"We have always advocated and campaigned for resources for screening, particularly in relation to cervical screening because it is the best measure we have to avoid cervical cancer, which is a terrible cancer, but is one that, if caught early enough, can be managed".
The statement continued: "CervicalCheck has detected and treated over 50,000 pre-cancerous changes in women, reducing their risk of cervical cancer by more than 90%".
"Despite these achievements, every diagnosis of cervical cancer is one too many and we acknowledge the impact of this disease on women and their families".
"Figures from National Cancer Registry Ireland show that the cervical cancer rate in Ireland has reduced significantly as a direct result of the CervicalCheck programme".