Follows outbreak of infectious virus which can be deadly in humans . Chickens culled and eggs hatch in pits in order to spread virus . This has caused deaths of nearly 300 people worldwide since 2006 .
Follows outbreak of H5N1 virus which can be deadly in humans . Chickens culled and eggs buried in pits in bid to contain virus . Virus has caused deaths of nearly 400 people worldwide since 2006 .