Is it a government requirement to be vaccinated...

In order to be able to obtain a work/residence permit, foreign nationals need to be free of all forms of communicable diseases such as HIV and TB.
In addition, the following categories of workers should test negative for syphilis and Hepatitis B:
Workers in nurseries
Domestic workers including housemaids, nannies and drivers
Food handlers and workers in restaurants and cafes
Workers in saloons and beauty centres
Workers in health clubs
Female domestic workers must test negative for pregnancy.