It followed the worst measles outbreak in two decades in 2019, when more than 2000 people caught the disease.
Four people with measles visited Tairawhiti during that time, but it didn't spread to residents.
The Government secured 350,000 doses of the MMR vaccine, but Stuff revealed earlier this month that more than 250,000 of those measles vaccines would expire before they could be used.
At a Hauora Tairawhiti DHB meeting on Monday, board member Tony Robinson asked how the programme was being delivered to the community.
He said he knew a young adult in the target age group that wasn't immune to MMR, and wondered how that person was being followed up, or could access the vaccine.
Hauora Tairawhiti planning and funding group manager Nicola Ehau said anyone who hadn't received the MMR vaccine should have been followed up by their general practice.
Ministry of Health manager of immunisation Kath Blair said the campaign had been impacted by Covid-19 and the redeployment of DHB staff to support the response.
“During this time, the Ministry and DHBs continue to encourage GPs and participating pharmacists to take every opportunity to offer MMR to the target audience.
“This includes GPs recalling patients who missed having MMR as children, as well as offering MMR when a young adult presents about another matter.”
Some DHBs continued with outreach clinics, workplace and school-based programmes, she said.
The increase in more than 9000 trained and active vaccinators across the country to help with the Covid-19 vaccine programme would give more capacity to deliver other immunisation programmes later in the year, Blair said.
“Our workforce will also be able to apply the experience gained delivering a mass vaccination roll-out to bring to the MMR campaign.
“Measles is highly contagious and can make you very sick, so we urge 15 to 30-year-olds who may have missed their vaccination as a child — or who aren't sure if they're immunised — to get immunised.”