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. 2023 Apr;29(4):822-825.
doi: 10.3201/eid2904.221268. Epub 2023 Mar 14.

Two-Year Cohort Study of SARS-CoV-2, Verona, Italy, 2020‒2022

Zeno Bisoffi, Nicoletta De Santis, Chiara Piubelli, Michela Deiana, Francesca Perandin, Pietro Girardi, Luca Heller, Natalia Alba, Carlo Pomari, Massimo Guerriero

Two-Year Cohort Study of SARS-CoV-2, Verona, Italy, 2020‒2022

Zeno Bisoffi et al. Emerg Infect Dis. 2023 Apr.

Abstract

We performed a follow-up of a previously reported SARS-CoV-2 prevalence study (April‒May 2020) in Verona, Italy. Through May 2022, only <1.1% of the city population had never been infected or vaccinated; 8.8% was the officially reported percentage. Limiting protection measures and vaccination boosters to elderly and frail persons seems justified.

Keywords: COVID-19; Italy; SARS-CoV-2; Verona; cohort study; coronavirus disease; coronaviruses; cumulative incidence; elderly; frail persons; incidence; pandemic; prevalence; reported data; respiratory infections; sampling data; serologic testing; vaccine; viruses; zoonoses.

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Figures

Figure 1
Figure 1
Flow chart for study of reported and sampling data for SARS-CoV-2, Verona, Italy, May 2020‒2022, starting from the initial sample of 1,515 persons who participated in the first study.
Figure 2
Figure 2
Reported and sampling data for SARS-CoV-2, Verona, Italy, May 2020‒2022. Comparison is shown between official (reported) and Verona study proportions of naive (A), vaccinated (B), and infected (C) persons. Values along data lines indicate cumulative incidence.
See this image and copyright information in PMC

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