Kaiser Permanente Vaccine Study Center, Oakland, California 94612, USA.
Emerg Infect Dis. 2010 Mar;16(3):504-6. doi: 10.3201/eid1603.091285.
After the appearance of pandemic (H1N1) 2009 in April 2009, influenza activity was monitored within the Kaiser Permanente Northern California division by using laboratory, pharmacy, telephone calls, and utilization (services patients received) data. A combination of testing and utilization data showed a pattern of disease activity, but this pattern may have been affected by public perception of the epidemic.
2009 年 4 月大流行性（H1N1）2009 出现后，凯撒永久医疗集团北加利福尼亚分部通过实验室、药房、电话和利用（患者接受的服务）数据监测流感活动。测试和利用数据的组合显示了疾病活动的模式，但这种模式可能受到公众对疫情的看法的影响。
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