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Updated: Jan 25, 2026

Experimental Human Pneumococcal Carriage
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Experimental Human Pneumococcal Carriage

Published on: February 15, 2013

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加拿大老龄化纵向研究 (CLSA) 中肺炎球菌疫苗覆盖率的变化:基于2018-2021年后续2调查的分析

Giorgia Sulis1,2, Nawal Maredia1, Christina Wolfson3,4

  • 1Faculty of Medicine, School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada.

PloS one
|January 23, 2026
PubMed
概括

加拿大的肺炎球菌疫苗接种覆盖率仍然很低,只有56.8%的老年人和19.3%的慢性疾病患者接种了疫苗. 在2015-2021年间,覆盖率的增长很小,这凸显了改善公共卫生战略的必要性.

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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Surveys are essential for marking property boundaries near water bodies. Different types of surveys are defined, each with its own function. Land surveys mark the property boundaries, while route surveys determine the position of properties on nearby highways. Topographic surveys create maps by capturing the three-dimensional features of the land. Hydrographic surveys focus on the shapes of underwater areas and the movement of streams through the properties. Mine surveys determine the relative...
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