Cancer patients have a well-known and higher risk of vaccine-preventable disease (VPD) than the general population. VPD can cause serious complications due to compromised immune system, malnutrition and the same oncology treatments and represent a severe financial burden with a delay in treating the underlying cancer The main purpose of this survey is to analyse the perception of cancer patients on the topic vaccines and vaccine-preventable diseases, the acceptability of vaccines and the evaluation of the determining factors associated with the choice of the patient to be vaccinated or not. This information will be used to improve the management of these issues.

Inclusion Criteria:

1. >18 years of age;
2. Oncology patient defined as a patient with solid tumors undergoing active systemic treatment or follow-up;
3. Written informed consent

Exclusion Criteria:

1. Patients with hematological tumors
2. Patients who are unable to understand informed consent document

The population of this cross-sectional survey will include out-patients of the Medical Oncology Unit, Fondazione IRCCS Policlinico San Matteo Pavia