Adverse event following immunisation Factsheet
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Vaccines, like any medication or natural therapy, can have side effects. An adverse event following immunisation (AEFI) refers to any untoward medical occurrence that follows immunisation. It does not necessarily have a causal relationship with the vaccine (Australian Immunisation Handbook).
Most reactions, such as low-grade fever and pain at the injection site, are mild and are usually short lasting, and do not require special treatment.
Notifiable adverse event following immunisation is now a notifiable condition in South Australia.
Notifiable AEFI is defined as an AEFI that is a not a very common or common AEFI.
Prior to April 2021, the SA Health Communicable Disease Control Branch (CDCB) collected
data on AEFI from immunisation providers and the general public on a voluntary basis. In April
2021, AEFI became a notifiable condition in South Australia on a temporary basis by notice in
the South Australian Government Gazette. In October 2021, notifiable AEFI became a
notifiable condition on an ongoing basis after it was added to the list of notifiable conditions in
the South Australian Public Health (Notifiable and Controlled Notifiable Conditions) Regulations
Health practitioners will be exempt from notifying an AEFI if they know or reasonably believe that the notification has already been made by another health practitioner who is required to notify. The general public will still be able to report AEFI to SA Health on a voluntary basis (a report by the general public does not remove the requirement for a health practitioner to also notify).
All AEFI need to be notified except for very common or common adverse events. A notifiable AEFI which occurs after receiving any vaccine requires notification.
For further detail on what is considered a very common or common adverse event refer to the Australian Immunisation Handbook (the Handbook) or Australian Technical Advisory Group on Immunisation (ATAGI) clinical advice. The Handbook has information on adverse events in a
number of sections including the “adverse events” section in each vaccine preventable disease
chapter and in a table entitled “Common side effects following immunisation for vaccines used
in the National Immunisation Program schedule”. ATAGI clinical advice is particularly relevant
for adverse events following COVID-19 vaccines as the Handbook currently does not contain
information on COVID-19 vaccines.
Reporting an AEFI is an essential part of ensuring ongoing vaccine safety monitoring. Being able to identify and respond quickly to any issues relating to vaccine safety is an essential part of maintaining public trust and confidence.
The South Australian Vaccine Safety Surveillance (SAVSS) is a passive surveillance system designed for timely detection of signals suggestive of an increase in AEFI associated with a particular vaccine. Reporting suspected AEFI to SAVSS enhances SA Health's ability to provide advice and make recommendations about the safety of vaccines
SAVSS enables the safe monitoring of immunisation programs in South Australia.
The preferred method to submit a report to SA Health is by completing the online Vaccine Reaction Report Form using the South Australian Vaccine Safety Surveillance System (SAVSS).
On completion of the online report form, a lodgement number will be issued. If you have provided an email address, the option to receive confirmation including your lodgement number by email, is available. There is also an option to print a copy of your report.
If you are unable to complete an online report you can phone 1300 232 272 during business hours.
All notifiable AEFIs must be reported to SA Health however, in addition, health care providers
may choose to also report these AEFI directly to the Therapeutic Goods Administration (TGA).
AEFI reports received by SA Health are deidentified and sent to the TGA which means if an
AEFI has been reported to SA Health then there is no requirement to also report this to the
Each report received by SA Health is assessed and triaged according to urgency. A specialist team provides appropriate advice and follow up for individuals who have experienced an AEFI. Unexpected or unusual reactions in children may be referred to the Specialist Immunisation Service (SIS).
Adults identified as at risk of AEFI or those who experience AEFIs in the context of a COVID-19
vaccine may be referred to the South Australian COVID-19 Specialist Immunisation Clinic (SACSIC).
SA Health submits all reports to the Therapeutic Goods Administration (TGA). These reports contribute to national vaccine safety surveillance.
Yes. Before a vaccine can be used in Australia it must be licensed by the TGA. The TGA extensively assess each vaccine for safety and effectiveness, with assessment based on scientific evidence. This testing is required by law and is usually undertaken over many years during the vaccine’s development. The TGA continues to monitor the safety of vaccines once they are registered.
For information on adverse event following immunisation visit SA Health's Immunisation provider information or contact the Communicable Disease Control Branch Immunisation Section on 1300 232 272 during business hours.