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Airborne
Spread of FMD Virus
Enforcement of Movement Controls
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Airborne spread of FMD is only a consideration where:
• pigs are present as the producer species
• relative humidity is greater than 60%
• there are light to moderate winds in a constant direction likely to pose a risk
• the 'atmospheric boundary height' is low resulting in minimal plume disruption in the
atmosphere.
If these considerations are met, then movement controls and buffer zones
must be tailored accordingly.
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