Clinical and epidemiological characteristics of SARS-CoV-2 Infection in Los Angeles County youth during the first year of the pandemic.

Autor:	Saleh T; Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA. Electronic address: tawnysaleh@mednet.ucla.edu., Kerin T; Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Fuller T; Institute of the Environment & Sustainability, UCLA, Los Angeles, CA, USA., Paiola S; Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Cambou MC; Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Motwani Y; Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Newhouse CN; Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Yang S; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Kamau E; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Garner OB; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Chandrasekaran S; Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA., Nielsen-Saines K; Department of Pediatrics, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
Jazyk:	angličtina
Zdroj:	International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases [Int J Infect Dis] 2022 Sep; Vol. 122, pp. 514-520. Date of Electronic Publication: 2022 Jul 06.
DOI:	10.1016/j.ijid.2022.06.040
Abstrakt:	Objectives: The aim of this study was to characterize SARS-CoV-2 infection patterns in Los Angeles (LA) County youth followed at our institution during the first pandemic year. Design: A prospective cohort of patients aged < 25 years who tested positive for SARS-CoV-2 using reverse-transcriptase polymerase chain reaction (RT-PCR) assays between March 13, 2020, and March 31, 2021, was evaluated at a large LA County health network. Demographics, age distribution, and disease severity were analyzed. Results: There were 28,088 youth aged < 25 years tested for SARS-CoV-2 using RT-PCR, with 1849 positive results identified (7%). Among the positive results, 475 of 11,922 (4%) were identified at the pandemic onset (March-September 2020) (Cohort 1) and 1374 of 16,166 (9%) between October 2020 and March 2021 (Cohort 2), P < 0.001. When disease severity was compared across cohorts, Cohort 2 had a greater proportion of asymptomatic and mild/moderate disease categories than Cohort 1 (98% vs 80%, respectively); conversely, Cohort 1 had a near-10-fold higher proportion of severe disease than Cohort 2 (17% vs 1.8%). Cohort 2 comprised younger patients with a mean age of 13.7 years vs 17.3 years in Cohort 1. Older age was associated with a higher percentage of infection, with 63% of all confirmed cases found in participants aged 19 to 25 years in Cohort 1, compared with 38% of confirmed cases in Cohort 2. Age increase was also associated with greater disease severity by linear regression modeling (P< 0.001). Conclusion: Coronavirus disease 2019 (COVID-19) disease severity in youth decreased over time in LA County during the first pandemic year, likely a reflection of changing demographics, with younger children infected. A higher infection rate in youth did not lead to higher disease severity over time. Competing Interests: Declaration of Competing Interest The authors have no competing interests to declare. (Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Databáze:	MEDLINE
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