Nikki Turner: Medical Director at The Immunisation Advisory Centre on the parents who want to source unvaccinated blood for baby's surgery - Heather du Plessis-Allan Drive

Warnings letting a couple reject "jabbed" blood donations for their baby would set a dangerous precedent.

It's understood Health New Zealand is seeking court guardianship of the unwell four-month-old, with a court hearing set down for next Tuesday.

The parents won't allow doctors to use blood given by people vaccinated against Covid-19 for his crucial heart surgery. Instead, the pair want to use their own donors.

The Immunisation Advisory Centre's Nikki Turner says it could create the wrong assumptions.

"We've got to match the individual and then we've got to screen the blood for a whole lot of real scary issues like viruses, like HIV, and hepatitis. There's a proper process to go through to ensure our people have safe blood."

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