However, across all regions, the NHS seroprevalence rates show a highly significant difference when compared with the community population level seroprevalence rates (with no overlapping CIs between the two groups).
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National cross-sectional survey of 1.14 million NHS staff SARS-CoV-2 serology tests: a comparison of NHS staff with regional community seroconversion rates.
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This suggested a possible trend towards higher seroconversion rates in the areas with high death rates ( figure 1 ).