National Notifiable Diseases Surveillance System (NNDSS)

The National Notifiable Diseases Surveillance System (NNDSS) coordinates data on over 70 diseases that present a risk to public health in Australia. This helps us identify trends in diseases, assess the impact of disease control programs and develop policies to reduce the impact of these diseases.

About the NNDSS

The NNDSS coordinates national surveillance data for diseases on the National Notifiable Disease List. These notifiable diseases are those that present a risk to public health if there is an outbreak.

Every day, the state and territory health authorities advise us of new cases of those notifiable diseases.

Data reports

We collate, analyse and publish this information in our:

Why the NNDSS is important

By keeping track of notifiable diseases, the NNDSS enables us to:

  • identify national trends and outbreaks
  • respond to potential outbreaks
  • support quarantine activities
  • develop public health policy to reduce their incidence and impact
  • allocate resources where they are needed most
  • track our progress towards eradicating these diseases over time
  • meet international reporting requirements, such as providing disease statistics to the World Health Organization.

Data collection

Every day, the state and territory health authorities supply the NNDSS with de-identified notification data about new cases of notifiable diseases.

This data includes:

  • a unique record reference number
  • a state or territory identifier
  • a disease code
  • the date of onset
  • the date of notification to the health authority
  • sex of the case
  • age of the case
  • Indigenous status of the case
  • postcode where the case lives

The quality and completeness of the information we receive varies, because:

  • notifications come from various sources, including clinicians, laboratories and hospitals
  • states and territories have different ways for these sources to report cases
  • some people may choose to not provide all relevant information to health authorities.

We continuously aim to improve the national consistency of reporting by working with:

Diseases on the National Notifiable Disease List

The NNDSS keeps track of the following nationally notifiable diseases.

Bloodborne diseases

Gastrointestinal diseases

Listed human diseases

Listed human diseases are those listed in the Biosecurity (Listed Human Diseases) Determination 2016. Human influenza with pandemic potential is a listed human disease, but is nationally notifiable under ‘influenza (laboratory confirmed)’.

Sexually transmissible infections

Vaccine preventable diseases

Respiratory diseases

Vectorborne diseases


Other notifiable diseases

Diseases under national surveillance by other organisations

The Australian National Creutzfeldt-Jakob Disease Registry and the Kirby Institute are also monitoring:

This information helps to complement NNDSS data.


National Notifiable Diseases Surveillance System (NNDSS) contact

Contact us for information about the NNDSS or to request additional NNDSS data.
Date last updated:

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