Since June 2020, the SARS-CoV-2 Immunity and Reinfection Evaluation (SIREN) study has conducted routine PCR testing in UK healthcare workers and sequenced PCR-positive samples. SIREN detected increases in infections and reinfections and detected Omicron subvariant waves emergence contemporaneous with national surveillance. SIREN's sentinel surveillance methods can be used for variant surveillance.
CITATION STYLE
Foulkes, S., Monk, E. J. M., Sparkes, D., Hettiarachchi, N., Milligan, I. D., Munro, K., … Szewczyk, M. (2023). Early Warning Surveillance for SARS-CoV-2 Omicron Variants, United Kingdom, November 2021-September 2022. Emerging Infectious Diseases, 29(1), 184–188. https://doi.org/10.3201/eid2901.221293
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