Patients and healthcare professionals often lack adequate information regarding the possibility of vaccinating during febrile illnesses due to limited data. French guidelines on this topic remain vague, placing the responsibility for decision-making on healthcare professionals. This lack of clear guidance, combined with a perceived low urgency for vaccination in such cases, frequently leads to postponements, resulting in missed vaccination opportunities.

By investigating the knowledge, attitudes, perceptions, and behaviors of both patients and healthcare professionals, the investigators can identify obstacles and leverage incentives to promote vaccination during mild febrile illnesses. This approach could help reduce missed opportunities and improve vaccine coverage overall.

Inclusion Criteria:

• Healthcare professionals : to administer vaccines as part of their usual practice
• General population: adults aged 18 years old and over.

Exclusion Criteria:

• Healthcare professionals: professionals that do not vaccinate patients in their usual practice.
• General population : individuals under the age of 18 years old.

People in the general population and healthcare professionals concerned by vaccination.