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SARS-CoV-2 transmission in educational settings during an early summer epidemic wave in Luxembourg, 2020.
BMC Infect Dis. 2021 May 04; 21(1):417.BI

Abstract

BACKGROUND

Following a first wave in spring and gradual easing of lockdown, Luxembourg experienced an early second epidemic wave of SARS-CoV-2 before the start of summer school holidays on 15th July. This provided the opportunity to investigate the role of school-age children and school settings for transmission.

METHODS

We compared the incidence of SARS-CoV-2 in school-age children, teachers and the general working population in Luxembourg during two epidemic waves: a spring wave from March-April 2020 corresponding to general lockdown with schools being closed and May-July 2020 corresponding to schools being open. We assessed the number of secondary transmissions occurring in schools between May and July 2020 using routine contact tracing data.

RESULTS

During the first wave in March-April 2020 when schools were closed, the incidence in pupils peaked at 28 per 100,000, while during the second wave in May-July 2020 when schools were open, incidence peaked 100 per 100,000. While incidence of SARS-CoV-2 was higher in adults than in children during the first spring wave, no significant difference was observed during the second wave in early summer. Between May and July 2020, we identified a total of 390 and 34 confirmed COVID-19 cases among 90,150 school-age children and 11,667 teachers, respectively. We further estimate that 179 primary cases caused 49 secondary cases in schools. While some small clusters of mainly student-to-student transmission within the same class were identified, we did not observe any large outbreaks with multiple generations of infection.

CONCLUSIONS

Transmission of SARS-CoV-2 within Luxembourg schools was limited during an early summer epidemic wave in 2020. Precautionary measures including physical distancing as well as easy access to testing, systematic contact tracing appears to have been successful in mitigating transmission within educational settings.

Authors+Show Affiliations

Health Directorate, 1A-G Route de Trèves, L-2632 Findel, Luxembourg, Luxembourg. joel.mossong@ms.etat.lu.Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette and Belvaux, Luxembourg.Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Esch-sur-Alzette and Belvaux, Luxembourg.Health Directorate, 1A-G Route de Trèves, L-2632 Findel, Luxembourg, Luxembourg. Department of Population Health, Luxembourg Institute of Health, Luxembourg, Luxembourg.Health Directorate, 1A-G Route de Trèves, L-2632 Findel, Luxembourg, Luxembourg. Department of Population Health, Luxembourg Institute of Health, Luxembourg, Luxembourg.Department of Population Health, Luxembourg Institute of Health, Luxembourg, Luxembourg.Health Directorate, 1A-G Route de Trèves, L-2632 Findel, Luxembourg, Luxembourg.Health Directorate, 1A-G Route de Trèves, L-2632 Findel, Luxembourg, Luxembourg. Department of Population Health, Luxembourg Institute of Health, Luxembourg, Luxembourg.Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette and Belvaux, Luxembourg. Department of Life Sciences and Medicine, Faculty of Science, Technology and Medicine, University of Luxembourg, Belvaux, Luxembourg.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33947340

Citation

Mossong, Joël, et al. "SARS-CoV-2 Transmission in Educational Settings During an Early Summer Epidemic Wave in Luxembourg, 2020." BMC Infectious Diseases, vol. 21, no. 1, 2021, p. 417.
Mossong J, Mombaerts L, Veiber L, et al. SARS-CoV-2 transmission in educational settings during an early summer epidemic wave in Luxembourg, 2020. BMC Infect Dis. 2021;21(1):417.
Mossong, J., Mombaerts, L., Veiber, L., Pastore, J., Coroller, G. L., Schnell, M., Masi, S., Huiart, L., & Wilmes, P. (2021). SARS-CoV-2 transmission in educational settings during an early summer epidemic wave in Luxembourg, 2020. BMC Infectious Diseases, 21(1), 417. https://doi.org/10.1186/s12879-021-06089-5
Mossong J, et al. SARS-CoV-2 Transmission in Educational Settings During an Early Summer Epidemic Wave in Luxembourg, 2020. BMC Infect Dis. 2021 May 4;21(1):417. PubMed PMID: 33947340.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - SARS-CoV-2 transmission in educational settings during an early summer epidemic wave in Luxembourg, 2020. AU - Mossong,Joël, AU - Mombaerts,Laurent, AU - Veiber,Lisa, AU - Pastore,Jessica, AU - Coroller,Gwenaëlle Le, AU - Schnell,Michael, AU - Masi,Silvana, AU - Huiart,Laetitia, AU - Wilmes,Paul, Y1 - 2021/05/04/ PY - 2020/10/14/received PY - 2021/04/20/accepted PY - 2021/5/5/entrez PY - 2021/5/6/pubmed PY - 2021/5/18/medline SP - 417 EP - 417 JF - BMC infectious diseases JO - BMC Infect Dis VL - 21 IS - 1 N2 - BACKGROUND: Following a first wave in spring and gradual easing of lockdown, Luxembourg experienced an early second epidemic wave of SARS-CoV-2 before the start of summer school holidays on 15th July. This provided the opportunity to investigate the role of school-age children and school settings for transmission. METHODS: We compared the incidence of SARS-CoV-2 in school-age children, teachers and the general working population in Luxembourg during two epidemic waves: a spring wave from March-April 2020 corresponding to general lockdown with schools being closed and May-July 2020 corresponding to schools being open. We assessed the number of secondary transmissions occurring in schools between May and July 2020 using routine contact tracing data. RESULTS: During the first wave in March-April 2020 when schools were closed, the incidence in pupils peaked at 28 per 100,000, while during the second wave in May-July 2020 when schools were open, incidence peaked 100 per 100,000. While incidence of SARS-CoV-2 was higher in adults than in children during the first spring wave, no significant difference was observed during the second wave in early summer. Between May and July 2020, we identified a total of 390 and 34 confirmed COVID-19 cases among 90,150 school-age children and 11,667 teachers, respectively. We further estimate that 179 primary cases caused 49 secondary cases in schools. While some small clusters of mainly student-to-student transmission within the same class were identified, we did not observe any large outbreaks with multiple generations of infection. CONCLUSIONS: Transmission of SARS-CoV-2 within Luxembourg schools was limited during an early summer epidemic wave in 2020. Precautionary measures including physical distancing as well as easy access to testing, systematic contact tracing appears to have been successful in mitigating transmission within educational settings. SN - 1471-2334 UR - https://www.unboundmedicine.com/medline/citation/33947340/SARS_CoV_2_transmission_in_educational_settings_during_an_early_summer_epidemic_wave_in_Luxembourg_2020_ L2 - https://bmcinfectdis.biomedcentral.com/articles/10.1186/s12879-021-06089-5 DB - PRIME DP - Unbound Medicine ER -