The link you followed will bring you to this page:

https://www.garanteprivacy.it/documents/10160/0/FAQ+-+Trattamento+di+dati+relativi+alla+vaccinazione+anti+Covid-19+nel+contesto+lavorativo+-+versione+vademecum.pdf/ba389a97-5cc5-6bd5-fef7-debe613524c6?version=1.0