UPDATE: A million more New Zealanders over 18 will be eligible for their booster from this Friday.

Cabinet has considered advice from the Director-General of Health and the Covid-19 Vaccine Technical Advisory Group and decided to reduce the interval between a person's primary vaccination course and the booster from 4 months to 3 months – starting this Friday 4 February.

'This is a significant step in our response to the Covid-19 pandemic as it now means a total of 3,063,823 people aged 18 and over – two thirds of our population – will be eligible for their booster from this weekend,” says Covid-19 Response Minister Chris Hipkins announced today.

More than 1.3 million people have already got theirs.

'I urge every New Zealander who is eligible for a booster to get it as soon as possible. We are in a race against Omicron and the more people who are boosted the more we can reduce the impact of the outbreak.

'Bringing forward the booster timing will help those who have been immunised more recently. It will mean more people, especially Māori, will be able to receive a booster before Omicron takes hold in communities.

'Boosters lower your chances of getting very sick from the Omicron variant of Covid-19 and ending up in hospital. Fewer hospitalisations from Covid-19 will mean our health system can continue to provide the full range of care people need, in particular for our most vulnerable such as people with disabilities or long-term illnesses.

'It is also important to reduce impacts on other workforces such as those involved with the supply chain to ensure people have access to goods and services."

Hipkins says New Zealand is in the top 10 most highly vaccinated countries in the OECD – 94 per cent of us aged over 12 are fully vaccinated.

That's close to four million New Zealanders, over a quarter of which have now also had their booster shot.

'Now is our opportunity to build on that. We have given ourselves a head start that we cannot afford to give up.

'If you are over 18 and it is three months since you received your primary vaccination course, get your booster. There is excellent capacity this weekend and in the coming weeks and enough supply throughout Aotearoa for everyone.

'Thank you to our vaccination providers and staff across the country who are working the long weekend to ensure New Zealanders have options to access their booster dose, wherever they are,” says Hipkins.

EARLIER:

Prime Minister Jacinda Ardern and Covid-19 Response Minister Chris Hipkins will be join Director-General of Health Dr Ashley Bloomfield and Ministry of Health Chief Science Advisor Ian Town to make an announcement on booster vaccines.

The group are expected to be live from 1.30pm.

The Ministry of Health reports there were 38,332 booster doses administered yesterday, taking the total to date to 1,362,811. Also, 8,636 paediatric doses were given yesterday, bringing the total to 177,964.

"With Omicron in New Zealand, one of the best things you can do is get your booster as soon as it is due.

"Boosters lower your chances of getting very sick and being hospitalised. Being boosted also helps slow the spread of the virus.

"If you're over 18 and your booster is due, please get it now. Evidence to date is that the rate of adverse reactions to a booster dose is similar to people receiving their second dose."

Tune into the livestream above to see what they have to say.

SunLive will provide updates throughout the afternoon for those who are not able to tune into the livestream.