Social & Preventive Medicine 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 💡 Explanation Which of the following statements is true regarding for influenza vaccine ✓ Correct Answer: D. Aquatic birds are reservoirs