The decision to change the definition of fully vaccinated from two to three jabs could create confusion if Australian state governments decide to expand current booster mandates, according to vaccine developer Nikolai Petrovsky. On Feb. 10, the Australian Technical Advisory Group on Immunisation (ATAGI), announced that individuals would only be considered “fully vaccinated” or “up-to-date” if they have received three jabs of an approved vaccine. “ATAGI has advised that a booster can be given safely and effectively at any time after 6 months to become ‘up-to-date’ in the event that the booster had not been received earlier,” Prime Minister Scott Morrison said in a statement. “In its advice ATAGI acknowledges that this change in the definition of up-to-date status for COVID-19 vaccines may impact the status of an individual’s COVID-19 immunisation certificate,” he added, noting sufficient time should be provided to accommodate changes. ATAGI has recommended the new standards be applied …