A nurse has tested negative to coronavirus (covid-19) three times despite experiencing symptoms of the disease.

The nurse, Nicole Williams who admitted to the University Hospital of Wales in Cardiff where a CT scan revealed she has the coronavirus, carried out the Covid-19 swab tests three times after she first experienced symptoms.

It was her fourth Covid-19 swab test that gave a positive result – almost three weeks after she first experienced symptoms. This has cast doubt on the effectiveness of Covid-19 swab tests

Nicole from Caerphilly, south Wales, took to her Facebook page to recount her ordeal, she wrote;

‘The last 15 days have honestly been horrendous.

‘If you honestly think that having no underlying health conditions, being young, being fit, makes you exempt from coronavirus please, please think again.’

She revealed she felt ‘run down’ nineteen days ago, suffering a cough and a ‘mild sore throat’. Three days later she underwent a swab test because of her work as a nurse.

‘Purely because of my job, so that I could continue to work, not because I felt ill,’ she explained.

The day after the test she woke with chest tightness and a persistent dry cough. She suffered wheezing and pain when breathing.

She said: ‘I have never suffered with my chest so for me this was completely out of the ordinary.’

A day later her condition deteriorated and she developed a high temperature – but her swab test results were returned negative.

‘I felt so poorly I phoned my GP,’ she explained. ‘She was unable to see me, as despite the negative result, I was displaying signs of COVID-19 and she explained there have been a number of false negative results.

‘I was seen in a Covid hub and after examination told it appeared I had a secondary pneumonia consistent to COVID-19.

‘I was given antibiotics just in case it was a bacterial infection rather than caused through coronavirus. These did not work.’

Over the following two weeks up until yesterday, Ms Williams was admitted to hospital twice after friends and relatives grew concerned at her breathing difficulties.

She had two further swab tests while undergoing treatment for ‘pretty much all the symptoms of COVID-19’, which also gave a negative result, before undergoing a scan.

‘A CT scan proved that despite the negative swabs I have actually got COVID-19, with viral pneumonia on both lungs,’ she said.

‘Following the CT scan my 4th swab finally came back positive.’

Ms Williams said catching the virus has left her with asthma as well as lasting damage to her heart and lungs.

‘This virus is truly awful,’ she wrote. ‘I’m one of the lucky ones who is still sat here able to write this post. Others aren’t so lucky.

‘It’s not left me unscathed though, It’s triggered asthma as a side effect which will probably remain with me. I’m in pulmonary hypertension and have an enlarged pulmonary artery, so now have to be followed up by cardiology.’

She added: ‘Please follow government guidelines regarding social distancing and isolation.

‘My family have been through hell with worry, especially the last week! I’m finally starting to feel a bit more human now, but I’ve still got a way to go yet.’