The following are multiple choice questions (with answers) about medical knowledge.   **Question:** 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
['(D) Aquatic birds are reservoirs <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Secondary attack rate 5 to 15% \n (B) Virus shedding present before the pt presents with symptoms \n (C) 1 to 5 years is high risk age group \n (D) Aquatic birds are reservoirs <> possible answers', '  Which of the following statements is true regarding for influenza vaccine <> context@']