People aged 40 to 49 will be the next group to receive a coronavirus vaccine when the over 50s have been given the jab - currently expected to be by mid April.
The UK scientific advisors whose recommendations have been used by all the governments in the UK - including Wales - have ruled against giving priority to police officers and teachers in the next phase of the vaccine rollout.
The Joint Committee on Vaccination and Immunisation (JCVI) said that focusing on age would "provide the greatest benefit in the shortest time".
It concluded that the most effective way to prevent death and hospital admission is to carry on prioritising people by age.
The Welsh Government has followed the independent advice on vaccine priority from the JCVI since the start of the vaccine rollout as have all the devolved administrations.
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Professor Wei Shen Lim, Covid-19 chair for JCVI, said: "Vaccinations stop people from dying and the current strategy is to prioritise those who are more likely to have severe outcomes and die from Covid-19.
"The evidence is clear that the risk of hospitalisation and death increases with age.
"The vaccination programme is a huge success and continuing the age-based rollout will provide the greatest benefit in the shortest time, including to those in occupations at a higher risk of exposure."
The JCVI said modelling studies for phase 2 of the vaccination programme also indicate that the speed of vaccine deployment is the most important factor in helping prevent severe illness and death.
This means that in phase 2, priority will be given in the following order:
- All those aged 40-49
- All those aged 30-39
- All those aged 18-29
These groups will be vaccinated once all those in phase 1 (the over-50s and most vulnerable) have received a jab.
There has been sustained pressure for police officers and teachers to be given prioity access to vaccines because of the amount of face to face contact they have as part of their job.
What does this mean for Wales?
The First Minister has long said he will not be deviating from the JCVI advice meaning the chances of priority vaccines for certain professions in Wales is very low. Mr Drakeford explained previously to WalesOnline the reason he was uninclided to offer vaccinations based on people's profession.
He said: "We would like as many people as possible to be vaccinated but it has to be a sense of priority.
"What they say they have done is focus on those groups if you offer vaccines you will save lives.
"To save a single life you have to vaccinate 40 people in a single care home.
"To save a single life you have to vaccinate 150 aged over 80.
"To save a single life you have to vaccinate 62,000 teachers aged under 30.
"And that is why the advice focuses on getting those people vaccinated first to save the most amount of lives."
The JCVI said that targeting occupational groups (such as teachers) would have been more complex to deliver and may slow down the vaccine programme, leaving some vulnerable people at higher risk for longer.
It also said that, operationally, simple and easy-to-deliver programmes are "critical for rapid deployment and high vaccine uptake".