RT Journal Article SR Electronic(1) A1 Larosa, Elisabetta A1 Djuric, Olivera A1 Cassinadri, Mariateresa A1 Cilloni, Silvia A1 Bisaccia, Eufemia A1 Vicentini, Massimo A1 Venturelli, Francesco A1 Giorgi Rossi, Paolo A1 Pezzotti, Patrizio A1 Bedeschi, Emanuela A1 the Reggio Emilia Covid-19 Working Group YR 2020 T1 Secondary transmission of COVID-19 in preschool and school settings in northern Italy after their reopening in September 2020: a population-based study JF Eurosurveillance VO 25 IS 49 SP 2001911 OP DO https://doi.org/10.2807/1560-7917.ES.2020.25.49.2001911 UL https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2020.25.49.2001911