Which of the following statements is true regarding for influenza vaccine
A. Secondary attack rate 5 to 15%
B. Virus shedding present before the pt presents with symptoms
C. 1 to 5 years is high risk age group
D. Aquatic birds are reservoirs
Answer.D. Aquatic birds are reservoirs
* RESERVOIR: Humans are the principle reservoir of human influenza A viruses. The avian reservoir of influenza A viruses is wild birds, predominantly ducks, geese, and shorebirds.
* Seasonal influenza tends to target children younger than 12 months of age and adults 65 years old or older.
* Secondary attack rates were estimated at 10.3% (95% CI 6.8-14.7) for secondary cases with influenza-like illness and 20.2% (95% CI 15.4-25.6) for secondary cases with acute respiratory illness.