Alliance for Pandemic Preparedness

January 26, 2021

Numbers of Close Contacts of Individuals Infected with SARS-CoV-2 and Their Association with Government Intervention Strategies

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[Pre-print, not peer-reviewed] Analysis of more than 140,000 contacts of over 40,000 SARS-CoV-2 positive cases in Ireland from May to December 2020 showed that the number of contacts per case varied across specific populations and trended with implementation of government interventions. The number of contacts per case was highest among those aged 18-24 years and lowest among those >65 years. The number of contacts per case increased after stay-at-home orders were lifted in May from a minimum of 2 to a peak of 6, then fell back to 2.6 at the beginning of Level 5 restrictions in October.

McAloon et al. (Jan 25, 2021). Numbers of Close Contacts of Individuals Infected with SARS-CoV-2 and Their Association with Government Intervention Strategies. Pre-print downloaded Jan 26 from https://doi.org/10.1101/2021.01.20.21250109