单选题 This vaccine is egg - based. What if I'm allergic to eggs?
You should avoid the vaccine. If you're in a high - risk group and you come down with the flu, see your doctor immediately. Antiviral medications, given within 24 to 48 hours of the onset of symptoms, can dramatically improve one's outcome.
The vaccine should avoid application to a person who

• A. is allergic to eggs.
• B. is in a high - risk group.
• C. has come down with the flu.
• D. has symptoms of the flu.