Public health professionals work to prevent disease and promote good health in the community. Much of the improvement in health since the 1800s has been because of public health work.
The Ministry of Health plays the lead role in public health, but other organisations such as local councils and Plunket also do significant work.
In the 1800s public health focused on controlling infectious diseases by:
- quarantining (isolating) people coming into New Zealand with diseases
- improving sewerage systems.
Later, drinking water was treated, but not until the 1950s for most communities.
Poor housing and overcrowding can cause illness, which is one reason the government began to build state houses in 1906. In the 2000s the government ran a scheme to encourage people to insulate their homes.
Laws were introduced to reduce air pollution, which can cause respiratory diseases, but it was still a problem in the 21st century.
From the 1950s there were campaigns and laws to discourage smoking, which causes diseases including cancer.
From the mid-1800s vaccines were developed to prevent infectious diseases. In the 2010s children have free access to vaccinations that provide protection against 13 different infectious diseases.
Other initiatives to encourage good health include:
- providing free milk for schoolchildren from 1937 to 1967
- encouraging healthy eating
- reducing tooth decay by adding fluoride to drinking water
- discouraging drink-driving
- screening at-risk women for cervical cancer or breast cancer.
Around 47% of New Zealanders experience some form of mental illness at some time in their life. From the 1970s there was a new focus on programmes that promoted mental wellness, rather than just treating illness. Because Māori and Pacific Island people have higher rates of mental illness, programmes and services target these groups.
Each year, more people die from suicide than from car crashes. Suicide prevention is a major public health concern.
Social and ethnic factors
Māori, Pacific Island people and those on low incomes are likely to have poorer health than others. The government has developed policies and programmes in response to these inequalities.