Will bird flu be the next pandemic and could it cause a lockdown? What experts say

HALESWORTH, UNITED KINGDOM – FEBRUARY 06: Battery hens sit in a chicken shed on February 6, 2007 in Suffolk, England. Russia, Ireland, Hong Kong, Japan, South Korea and South Africa have announced bans on UK poultry imports after the news that the Bernard Matthews poultry processing farm in the UK confirmed an outbreak of the H5N1strain of bird flu. A massive cull of over 160,000 turkeys has been completed by Government appointed vets. (Photo by Jamie McDonald/Getty Images)