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| Summary |
The World Health Statistics series is WHO's annual compilation
of health-related data for its 193 Member States, and includes a
summary of the progress made towards achieving the health-related
Millennium Development Goals (MDGs) and associated targets.
As with previous versions, World Health Statistics 2011 has
been compiled using publications and databases produced and
maintained by the technical programmes and regional offices of
WHO. Indicators have been included on the basis of their relevance
to global public health, the availability and quality of the data, and
the reliability and comparability of the resulting estimates. Taken
together, these indicators provide a comprehensive summary of the
current status of national health and health systems in key areas.
Every effort has been made to ensure the optimal use of reported
country data - adjusted where necessary to deal with missing
values, to correct for known biases and to maximize comparability.
In addition, statistical techniques and modelling have been used to
fill data gaps.
WHO presents World Health Statistics 2011 as an integral part of
its ongoing efforts to provide enhanced access to high-quality data
on core measures of population health and national health systems.
Unless otherwise stated, all estimates have been cleared following
consultation with Member States and are published here as official
WHO figures.
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