The HSE has said the ban on vaping devices and electronic cigarettes in Irish hospitals will continue - despite fresh calls for them to be officially licensed as medical aids for quitting smoking.
'We really want to get the message out that they really should consider using an e-cigarette because they're a lot better for them than continuing to smoke'.
PHE has published a review of the evidence, which states e-cigarettes are helping tens of thousands of smokers quit.
Paul Heckingbottom: Why I quit Barnsley to take over at rivals Leeds
Their first game in charge of Leeds United will be Saturday's Yorkshire derby against Sheffield United at Bramall Lane. Leeds United have appointed Paul Heckingbottom as their new manager following the sacking of Thomas Christiansen .
It calculated the risk of cancer to be less than 1%.
But the number of people using the products has "plateaued" and now stands at just under three million people in the UK, according to the review, which was conducted by experts from King's College London and the UK Centre for Tobacco and Alcohol Studies, the University of Stirling and Cancer Research UK.
Doctors and nurses can not prescribe e-cigarettes to smokers wanting to quit because none has yet been licensed by the Medicines and Health Care Products Regulatory Authority (MHRA).
However, after a steep rise in usage the number of e-cigarette users has plateaued at just under three million people in the United Kingdom, according to the review. Thousands of smokers think e-cigarettes are just as unsafe and 40% of smokers have not tried one, it says.
TRAPPIST-1 Planets Are All Rocky, Could Contain Significant Amounts of Water
The picture it paints is rough, but the researchers found that the planets weren't dense enough to be made of just rock and metal. What might these planets look like? At present, according to scientists, it is impossible to know exactly how each planet is.
Martin Dockerell, PHE tobacco control lead has advised that smoking should be completed banned from hospital grounds - with smoking shelters re-purposed as vaping shelters.
Hospitals in England are being advised by Public Health England (PHE) to sell e-cigarettes and let patients vape indoors - advice that has met with some resistance.
Undertaken by leading independent tobacco experts, the review indicated that vaping poses only a small fraction of the risks of smoking, meaning switching completely from smoking to vaping can deliver substantial health benefits.
Researchers at the UNC School of Medicine have found that adolescents who are not susceptible to smoking cigarettes and who thought e-cigarettes were less harmful were more likely to use e-cigarettes.
Clarence Seedorf: Deportivo La Coruna Hire Dutchman As manager
Clarence Seedorf has won four Champions League titles as a player with Ajax, Real Madrid and AC Milan. Parralo was the sixth coach to be dismissed by president Tino Fernandez since he took over in 2014.
"We hope this reports will.encourage the 40 per cent of smokers who've failed to quit but never tried vaping to go ahead and switch", it said in a statement.