Bird Flu (Avian Influenza)Chicken, man, and group of people. Most people who have been infected with bird flu have had direct contact with sick bird. Human-to-human infection has been very rare.

Bird flu (avian influenza) is a serious illness that affects the lungs. Currently, this illness mainly infects birds. But if the germs that cause bird flu begin to spread easily among people, a worldwide outbreak could occur. No one knows whether this will happen, but health experts are trying to prepare for such an event. This sheet answers some of the questions you may have about bird flu.

What are the risk factors for bird flu?

The biggest risk factor for bird flu is contact with sick birds. This is more likely to happen in parts of the world where people raise their own birds for food or where live birds are sold in markets.

How does bird flu spread?

Wild birds carry the germ (virus) that causes bird flu. They then spread the virus to farm-raised birds such as chickens, ducks, and turkeys. Most people who have had bird flu have touched an infected bird or its droppings. A few people have been infected without any known contact with an infected bird. This is rare.

There are many types (strains) of bird flu. In the U.S., it has been limited to the type that caused only mild to moderate illness. But there are strains that have caused more severe illness, including death, in other parts of world. There have been more than 650 cases of the more serious type of bird flu in humans since 2003. These cases have mostly occurred in Asia, Africa, the Pacific, Europe, and the Near East. The CDC watches the strains of bird flu found because changes can occur in the viruses that could make them more likely to infect humans.

What are the symptoms of bird flu?

The symptoms of bird flu are like ordinary flu (influenza). They include fever, sore throat, cough, and muscle aches. Some people develop eye infections. Pneumonia and other serious problems can also occur.

Can you get bird flu from eating chicken or other birds?

Heat kills the germs that cause bird flu. You can’t get bird flu from eating poultry or eggs that are fully cooked. But you can get sick from bacteria that may be present. To stay safe:

  • Wash your hands with soap and warm water for at least 20 to 30 seconds before and after handling raw chicken or eggs.

  • Cook poultry until a meat thermometer registers at least 165°F (74°C) at the thickest point. Cook eggs until the whites and yolks are firm.

  • Use one cutting board just for poultry. Don’t let raw juices touch other foods.

  • Clean knives and cutting boards with hot water and soap so they don’t contaminate other foods.

How is bird flu treated?

Scientists around the world are working to find a vaccine for bird flu. For now, healthcare providers often treat bird flu with antiviral medicines.

To learn more about bird flu

Visit the Centers for Disease Control and Prevention (CDC):

Avian Influenza A Virus Infections in Humans

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