Assessing a person’s Health, Age, Lifestyle and Occupation (HALO) can assist in identifying risk factors for vaccine-preventable diseases and therefore determine which immunisations may be warranted in adulthood.

Having certain Health issues, such as asthma; diabetes; heart, lung, spleen or kidney conditions, will pre-dispose people to certain vaccine preventable diseases. Your Age can make you more vulnerable to certain infections. Lifestyle choices, such as overseas travel or smoking are important factors to consider when assessing vaccine recommendations. Your Occupation can result in a greater risk of exposure with diseases, such as for those working in health care.

The HALO is a conversation starter, to help determine which immunisations would be beneficial for you or someone you care for. Remember, it is important to discuss you HALO with your doctor or immunisation provider.


Author: Rachael McGuire (SAEFVIC Research Nurse, Murdoch Children’s Research Institute)

Reviewed by: Rachael McGuire (SAEFVIC Research Nurse, Murdoch Children’s Research Institute)

Date: July 2020

Materials in this section are updated as new information and vaccines become available. The Melbourne Vaccine Education Centre (MVEC) staff regularly reviews materials for accuracy.

You should not consider the information in this site to be specific, professional medical advice for your personal health or for your family’s personal health. For medical concerns, including decisions about vaccinations, medications and other treatments, you should always consult a healthcare professional.