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Consumer Information & Resources

Avian Influenza (AI) Overview

Avian influenza, also referred to as bird flu, is a virus that infects all types of avian species, including wild birds and domestic poultry. AI is an animal health issue that causes mild to severe symptoms in birds, and in its most extreme form, can be fatal to infected birds. There have been no new detections of Avian influenza on egg farms in the U.S. since June 17, 2015.

According to the Centers for Disease Control (CDC), the strains of AI that have been found in the U.S. are not a public health concern and have not affected any humans to date.

Avian influenza is not a foodborne illness, which means it cannot be transmitted through safely handled and properly cooked poultry or eggs. To learn more about safely cooking and handling eggs, visit or the food safety page by the US Department of Health and Human Services. Further information is provided by USDA on avian influenza and egg safety.

Answers to Frequently Asked Questions

Farms Resume Full Production and Increase Protection of their Flocks

In the spring of 2015, more than 12 percent of America’s egg laying hens (35 million) were affected by an AI outbreak which disrupted egg production and the availability of eggs. While it took several months, U.S. egg farmers worked diligently to restore the egg supply to pre-AI levels. Since the 2015 AI outbreak, U.S. egg farmers have made significant increases to biosecurity measures on their farms to protect their flocks. Comprehensive disease prevention protocols on commercial egg farms include, but are not limited to, restricting farm access, preventing hens from exposure to wild and migratory birds, increasing veterinary monitoring of flocks and using protective gear at all times. For examples, see this information on disease prevention from United Egg Producers.

Latest Information

On March 5, 2017, the U.S. Department of Agriculture (USDA) confirmed that High Pathogen Avian Influenza (HPAI), strain H7, was detected on a commercial broiler (meat chicken) flock in Tennessee. Beginning in November 2016, HPAI has been confirmed in several Asian and European countries; for more on global AI detections see the World Organization for Animal Health website. For information on U.S. detections and biosecurity efforts, see the USDA-APHIS website.

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