The rapid increase of coronavirus cases in the Washington region has made the painstaking task of contact tracing more difficult, moving public health officials to prioritize whom to inform about potential exposure in a triage-like effort to keep the highly transmissible omicron variant from spreading even faster and further.Wp Get the full experience. Choose your plan ArrowRight Since Thanksgiving, the seven-day average of new cases in the District, Maryland and Virginia has increased elevenfol
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华盛顿邮报-华盛顿特区
2022-01-08 00:00:00.0