A nurse gave a baby boy the wrong vaccine and then tried to cover up her mistake which meant the family couldn't be aware of possible harmful reactions.
Today, the nurse has been censured for the error after an investigation by the country's health watchdog, the Health and Disability Commission (HDC).
The decision comes two years after the mistake in July 2019.
Instead of the rotavirus vaccine, the nurse administered the baby with Prevenar 13, used to protect babies against pneumococcal disease, which the baby had already been given.
Essentially, the baby boy was given the same vaccination twice on the same day and missed out on the rotavirus jab, the HDC decision report said.