A third baby, less than a year old, has died of whooping cough this year, prompting a renewed push for people to get their pēpē vaccinated.
The highly infectious disease can be spread though coughing an sneezing and people can be contagious from a week before their symptoms start.
The latest death is unrelated to the two earlier cases. Whooping cough can be highly unpredictable in young babies and can get worse quickly.
Te Whatu Ora's Doctor William Rainger talks to Lisa Owen.