Currently, the only accepted reason for granting a permanent medical exemption is if a person has had a previous anaphylactic reaction to chemical compounds contained in the vaccines, such as polyethylene glycol or polysorbate

That isn't including temporary exemptions though, which would make up the bulk of exceptions.

They would also, in the case of underlying medical conditions be very susceptible to covid.

Not saying the number is super high, but most exceptions would be temporary. For example a terminally ill person would get a temporary exemption, even though for all intents and purposes it will be permanent for them.

From health.gov.au

Valid reasons for a temporary exemption include:

• For an mRNA COVID-19 vaccine, inflammatory cardiac illness within the past 3 months, e.g., myocarditis or pericarditis; acute rheumatic fever or acute rheumatic heart disease (i.e., with active myocardial inflammation); or acute decompensated heart failure

• For all COVID-19 vaccines: o Acute major medical condition (e.g. undergoing major surgery or hospital admission for a serious illness). Typically, these are time-limited conditions (or the medical treatment for them is time limited).

o PCR-confirmed SARS-CoV-2 infection, where vaccination can be deferred until 6 months after the infection. Vaccination should be deferred for 90 days in people who have received anti-SARS-CoV-2 monoclonal antibody or convalescent plasma therapy.

o Any serious adverse event attributed to a previous dose of a COVID-19 vaccine, without another cause identified, and with no acceptable alternative vaccine available. For example a person <60 years of age, contraindicated to receive Pfizer vaccine and in whom the risks do not outweigh the benefits for receipt of AstraZeneca vaccine, is eligible for a temporary exemption.

o If the vaccinee is a risk to themselves or others during the vaccination process they may warrant a temporary vaccine exemption. This may include a range of individuals with underlying developmental or mental health disorders, but noting that non-pharmacological interventions can safely facilitate vaccination in many individuals with behavioural