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This document, accessible through the WHO's Regional Office for Africa, helps national authorities develop communication plans for outbreaks to ensure accurate information reaches the public, builds trust, and supports coordination among public health
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sis, and Phase IV studies. Before new interventions are released into disease control programmes, it is essential that they are carefully evaluated in ‘field trials’. These may be complex and expensive undertakings, requiring the follow-up of hundreds, or thousands, of individuals, often for long periods. This manual was designed to provide guidance on the practical issues in great detail
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