In the past 12 months there had been 79 notifications of vaccine-preventable diseases such as measles, meningococcal, pertussis (whooping cough), invasive pneumococcal disease and tuberculosis.
"We see children with pertussis, and other serious infections that we know should be non-existent, or at least very rare, in our communities throughout Northland," Dr Tuck said.
Each preventable disease carried its own set of risks and some were more serious at certain ages, he said. Pertussis was most dangerous in young babies. Dr Tuck said one of the concerns was that, at six weeks, children were too young and fragile to be exposed to the "immunological challenge" of vaccination.
But a young infant was much less able to cope with full disease-causing organisms. Immunising/vaccinating on time was important, he said.
Another important benefit of the enhanced pneumococcal vaccination available was the significant protection it offered older people from a common killer of the elderly and frail.