The survey planned by Sapienza and Policlinico Umberto I general hospital involved healthcare workers subjected to the second dose of COVID Pfizer-BioNTech vaccine until 30 March 2021. A questionnaire on protective measures against SARS-CoV-2 was administered to 731 people aged between 24 and 69.

"The main message from the survey is that most respondents did not change their habits after vaccination. In particular, as many as 94% of the subjects stated that after the second vaccination against COVID-19, they did not change the frequency with which they wear the surgical or face mask in closed environments and with people other than family members and cohabitants. Only 4% admitted to having slightly reduced this habit. Approximately 89% of the interviewees stated that after the second SARS-CoV-2 vaccination, they did not change the frequency with which they wear an FFP2 or double mask indoors and with people other than family members and cohabitants, and the frequency with which they wear a mask (surgical, face mask, or FFP2) outdoors.

After the second Covid-19 vaccination, 94% of the respondents keep washing their hands with soap and water or disinfected them with a hydroalcoholic solution for at least 20 seconds. Compliance with the maximum number of 6 people in their home, excluding family members and cohabitants did not change either.

Finally, 86% stated that they still social distance when outdoors, whereas, in 13% of the subjects, the habit has slightly decreased. These are significant results that show that the awareness of not lowering one's guard even after vaccination is widespread".

That was stated by the research coordinators, Professor Domenico Alvaro, director of the Department of Internal Medicine and Medical Specialties and dean of the Faculty of Medicine and Dentistry, and Professor Stefania Basili, director of the complex operational unit of Internal Medicine at Umberto I.