How is bird flu transmitted in chickens and other birds?!

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Direct contact with discharges from infected birds, especially feces and respiratory secretions
Contaminated feed, water, cages equipment, vehicles and clothing
Clinically normal waterfowl and sea birds my introduce the virus into flocks
Eggs from infected hens can break and contaminate incubators
Birds that survive infection excrete virus for at least 10 days, orally and in feces. Highly pathogenic viruses can survive for long periods in tissue, water and the environment, especially when temperatures are low.
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