TY - JOUR AU - Del Águila-Mejía, Javier AU - Wallmann, Reinhard AU - Calvo-Montes, Jorge AU - Rodríguez-Lozano, Jesús AU - Valle-Madrazo, Trinidad AU - Aginagalde-Llorente, Adrian T1 - Secondary Attack Rate, Transmission and Incubation Periods, and Serial Interval of SARS-CoV-2 Omicron Variant, Spain T2 - Emerging Infectious Disease journal PY - 2022 VL - 28 IS - 6 SP - 1224 SN - 1080-6059 AB - 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. KW - COVID-19 KW - incubation period KW - surveillance KW - Omicron variant KW - secondary attack rate KW - coronavirus disease KW - SARS-CoV-2 KW - severe acute respiratory syndrome coronavirus 2 KW - viruses KW - respiratory infections KW - zoonoses KW - Spain DO - 10.3201/eid2806.220158 UR - https://wwwnc.cdc.gov/eid/article/28/6/22-0158_article ER - End of Reference