Journal of travel medicine
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Hundred and ninety-six travellers with negative-COVID-19-tests prior to departure tested positive, on arrival at Madrid (April/June 2021), from a total of 45 211 travellers tested (0.43%). Viral loads (Ct: 20.3) were higher compared to the general population (Ct: 27.09). Our data reveal weaknesses in pre-departure testing and alert about high-viral-load-SARS-CoV-2 carriers in intercontinental flights.
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Randomized Controlled Trial Observational Study
Using trained dogs and organic semi-conducting sensors to identify asymptomatic and mild SARS-CoV-2 infections: an observational study.
A rapid, accurate, non-invasive diagnostic screen is needed to identify people with SARS-CoV-2 infection. We investigated whether organic semi-conducting (OSC) sensors and trained dogs could distinguish between people infected with asymptomatic or mild symptoms, and uninfected individuals, and the impact of screening at ports-of-entry. ⋯ People infected with SARS-CoV-2, with asymptomatic or mild symptoms, have a distinct odour that can be identified by sensors and trained dogs with a high degree of accuracy. Odour-based diagnostics using sensors and/or dogs may prove a rapid and effective tool for screening large numbers of people.Trial Registration NCT04509713 (clinicaltrials.gov).