Abstract
Contact tracing data of SARS-CoV-2 Omicron variant cases during December 2021 in Cantabria, Spain, showed increased transmission (secondary attack rate 39%) compared with Delta cases (secondary attack rate 26%), uninfluenced by vaccination status. Incubation and serial interval periods were also reduced. Half of Omicron transmissions happened before symptom onset in the index case-patient.
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CITATION STYLE
Del Águila-Mejía, J., Wallmann, R., Calvo-Montes, J., Rodríguez-Lozano, J., Valle-Madrazo, T., & Aginagalde-Llorente, A. (2022). Secondary Attack Rate, Transmission and Incubation Periods, and Serial Interval of SARS-CoV-2 Omicron Variant, Spain. Emerging Infectious Diseases, 28(6), 1224–1228. https://doi.org/10.3201/eid2806.220158
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