Mandatory boosters, page-37

As at 2 Jan
Patients in ICU
Unvaccinated - 48.4%
Vaccinated - 50.5%

As at 9 Jan
Patients in ICU
Unvaccinated - 49.1%
Vaccinated - 50.3%

As at 16 Jan
Patients in ICU
Unvaccinated - 43.8%
Vaccinated - 53.7%

As at 23 Jan
Patients in ICU
Unvaccinated - 35.7%
Vaccinated - 61.7%

The above info for NSW tells me something is happening to the vaccinated people.