Italy's rollout of COVID-19 vaccinations: The crucial contribution of the first experimental mass vaccination site in Lombardy.

Background: In occurrence of the coronavirusdisease 19 (COVID-19) pandemic, carrying out an efficient large-scale vaccination campaign is vital in order to control the virus. Especially in high prevalence areas of COVID - 19, it is crucial to implement an effective vaccination strategy. In Italy, programming an efficient COVID-19 mass vaccination campaign has been the main target of the Ministry of Health.