tetano
Editor, Senior Moderator
Sci Rep
. 2024 Aug 1;14(1):17848.
doi: 10.1038/s41598-024-68634-x. The public health impact of COVID-19 variants of concern on the effectiveness of contact tracing in Vermont, United States
François M Castonguay[SUP] 1 2 3 [/SUP], Brian F Borah[SUP] 4 5 [/SUP], Seonghye Jeon[SUP] 6 7 [/SUP], Gabriel Rainisch[SUP] 6 7 [/SUP], Patsy Kelso[SUP] 4 [/SUP], Bishwa B Adhikari[SUP] 6 7 [/SUP], Daniel J Daltry[SUP] 4 [/SUP], Leah S Fischer[SUP] 6 7 [/SUP], Bradford Greening Jr[SUP] 6 7 [/SUP], Emily B Kahn[SUP] 6 7 [/SUP], Gloria J Kang[SUP] 6 7 [/SUP], Martin I Meltzer[SUP] 6 7 [/SUP]
Affiliations
Case investigation and contact tracing (CICT) are public health measures that aim to break the chain of pathogen transmission. Changes in viral characteristics of COVID-19 variants have likely affected the effectiveness of CICT programs. We estimated and compared the cases averted in Vermont when the original COVID-19 strain circulated (Nov. 25, 2020-Jan. 19, 2021) with two periods when the Delta strain dominated (Aug. 1-Sept. 25, 2021, and Sept. 26-Nov. 20, 2021). When the original strain circulated, we estimated that CICT prevented 7180 cases (55% reduction in disease burden), compared to 1437 (15% reduction) and 9970 cases (40% reduction) when the Delta strain circulated. Despite the Delta variant being more infectious and having a shorter latency period, CICT remained an effective tool to slow spread of COVID-19; while these viral characteristics did diminish CICT effectiveness, non-viral characteristics had a much greater impact on CICT effectiveness.
Keywords: COVID-19; Case investigation; Cases averted; Contact tracing; Modeling.
. 2024 Aug 1;14(1):17848.
doi: 10.1038/s41598-024-68634-x. The public health impact of COVID-19 variants of concern on the effectiveness of contact tracing in Vermont, United States
François M Castonguay[SUP] 1 2 3 [/SUP], Brian F Borah[SUP] 4 5 [/SUP], Seonghye Jeon[SUP] 6 7 [/SUP], Gabriel Rainisch[SUP] 6 7 [/SUP], Patsy Kelso[SUP] 4 [/SUP], Bishwa B Adhikari[SUP] 6 7 [/SUP], Daniel J Daltry[SUP] 4 [/SUP], Leah S Fischer[SUP] 6 7 [/SUP], Bradford Greening Jr[SUP] 6 7 [/SUP], Emily B Kahn[SUP] 6 7 [/SUP], Gloria J Kang[SUP] 6 7 [/SUP], Martin I Meltzer[SUP] 6 7 [/SUP]
Affiliations
- PMID: 39090157
- DOI: 10.1038/s41598-024-68634-x
Case investigation and contact tracing (CICT) are public health measures that aim to break the chain of pathogen transmission. Changes in viral characteristics of COVID-19 variants have likely affected the effectiveness of CICT programs. We estimated and compared the cases averted in Vermont when the original COVID-19 strain circulated (Nov. 25, 2020-Jan. 19, 2021) with two periods when the Delta strain dominated (Aug. 1-Sept. 25, 2021, and Sept. 26-Nov. 20, 2021). When the original strain circulated, we estimated that CICT prevented 7180 cases (55% reduction in disease burden), compared to 1437 (15% reduction) and 9970 cases (40% reduction) when the Delta strain circulated. Despite the Delta variant being more infectious and having a shorter latency period, CICT remained an effective tool to slow spread of COVID-19; while these viral characteristics did diminish CICT effectiveness, non-viral characteristics had a much greater impact on CICT effectiveness.
Keywords: COVID-19; Case investigation; Cases averted; Contact tracing; Modeling.