Age-dependency of the Propagation Rate of Coronavirus Disease 2019 Inside School Bubble Groups in Catalonia, Spain.
Pediatr Infect Dis J
; 40(11): 955-961, 2021 11 01.
Article
in English
| MEDLINE | ID: covidwho-1758891
ABSTRACT
BACKGROUND:
We analyzed contagions of coronavirus disease 2019 inside school bubble groups in Catalonia, Spain, in the presence of strong nonpharmaceutical interventions from September to December 2020. More than 1 million students were organized in bubble groups and monitored and analyzed by the Health and the Educational departments.METHODS:
We had access to 2 data sources, and both were employed for the analysis, one is the Catalan school surveillance system and the other of the educational department. As soon as a positive index case is detected by the health system, isolation is required for all members of the bubble group, in addition to a mandatory proactive systematic screening of each individual. All infected cases are reported. It permits the calculation of the average reproductive number (R*), corresponding to the average number of infected individuals per index case.RESULTS:
We found that propagation inside of the bubble group was small. Among 75% index cases, there was no transmission to other members in the classroom, with an average R* across all ages inside the bubble of R* = 0.4. We found a significant age trend in the secondary attack rates, with the R* going from 0.2 in preschool to 0.6 in high school youth.CONCLUSIONS:
The secondary attack rate depends on the school level and therefore on the age. Super-spreading events (outbreaks of 5 cases or more) in childhood were rare, only occurring in 2.5% of all infections triggered from a pediatric index case.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
Schools
/
Students
/
SARS-CoV-2
/
COVID-19
Type of study:
Diagnostic study
/
Experimental Studies
/
Observational study
/
Randomized controlled trials
/
Systematic review/Meta Analysis
Limits:
Adolescent
/
Child
/
Child, preschool
/
Female
/
Humans
/
Male
Country/Region as subject:
Europa
Language:
English
Journal:
Pediatr Infect Dis J
Journal subject:
Communicable Diseases
/
Pediatrics
Year:
2021
Document Type:
Article
Affiliation country:
Inf.0000000000003279
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