1. Humans can only be infected with influenza type A, while birds can be infected with all three types (A, B, and C).

• a. True
• b. False

2. An influenza A subtype is named according to what two things that appear on its surface?

• a. Viruses
• b. Proteins
• c. Genes
• d. Neurons

3. Which one statement about bird flu is not correct?

• a. Domesticated birds may become infected through direct contact with other infected birds.
• b. Bird flu circulates among birds only in certain countries.
• c. Infection in domestic poultry causes two forms of disease distinguished by extremes of virulence.
• d. Fecal-to-oral transmission is the most common mode of spread between birds.

4. A risk for human health is that the avian flu virus will change into a form that is highly infectious for humans.

• a. True
• b. False

5. Which one of the following statements is not true?

• a. Influenza viruses change frequently by antigenic shift, but antigenic drift happens only occasionally.
• b. Antigenic shift results in a new influenza A subtype.
• c. Antigenic drift produces new virus strains that may not be recognized by antibodies to earlier influenza strain.
• d. Influenza type A viruses undergo both kinds of changes.

6. Influenza A viruses may be transmitted from animals to humans directly from birds or avian virus–contaminated environments, or through an intermediate host, such as a pig.

• a. True
• b. False

7. Symptoms of avian flu in humans may include any of the following except:

• a. Fever and muscle aches
• b. Eye infections
• c. Open sores
• d. Pneumonia

8. There is currently no commercially available vaccine to protect humans against the H5N1 virus that is being seen in Asia and Europe.

• a. True
• b. False

9. Currently, wearing a mask in public is recommended routinely for preventing influenza exposure.

• a. True
• b. False

10. The CDC rationale for enhanced precautions against avian flu is that each human infection represents an opportunity for the disease to further adapt and thus transmit more easily among people.

• a. True
• b. False

11. Recommended precautions by healthcare workers with patients suspected of having avian flu include:

• a. Eye protection within ten feet of the patient.
• b. Gloves and gown for all patient contact.
• c. Airborne isolation rooms are not recommended.
• d. Use of dedicated equipment such as stethoscopes is not recommended.

12. Healthcare workers involved in the care of patients with documented or suspected avian flu should be vaccinated with the most recent seasonal human flu vaccine.

• a. True
• b. False