Household transmission dynamics of COVID-19 among residents of Delhi, India: a prospective case-ascertained study

• DOI: 10.1016/j.ijregi.2023.02.005
• Publication Date: 2023-02-23T04:50:42Z
• Authors: Farzana Islam; Yasir Alvi; Mohammad Ahmad; Faheem Ahmed; Anisur Rahman; Farishta Hannah D...; Ayan Kumar Das; Mridu Dudeja; Ekta Gupta; Rashmi Agarwalla; Iqbal Alam; Sushovan Roy
• Keywords: Index case; Contact tracing; Odds

The aim of this study was to observe the secondary infection rate and transmission dynamics COVID-19 among household contacts, their associations with various factors across four dimensions interaction.This a case-ascertained unvaccinated contacts laboratory-confirmed case in New Delhi between December 2020 July 2021. For study, 99 index cases 316 were interviewed sampled (blood oro-nasal swab) on days 1, 7, 14, 28.The 44.6% (95% confidence interval (CI) 39.1-50.1). predictors individual contact levels were: being female (odds ratio (OR) 2.13), increasing age (OR 1.01), symptoms at baseline 3.39), during follow-up 3.18). Among cases, primary 1.03) 6.29) significantly associated infection. household-level patterns, having more rooms 4.44) taking care 2.02) infection.A high highlights need adopt strict measures advocate COVID-19-appropriate behaviors. A targeted approach for higher-risk would efficiently limit infections susceptible contacts.