Why may you be asked whether you are allergic to eggs before receiving a vaccination?

a. Some viruses are grown and isolated in embryonated eggs; especially those used for vaccines. The egg proteins may still be present in the viral vaccine preparations.
b. Some viruses used for vaccines are grown and isolated in embryonic eggs. Because of their growth in this environment, you may be allergic to the vaccine.
c. You are asked about allergies as a precaution any time you receive a vaccine.
d. This is an incorrect statement. You are usually never asked about allergies before receiving a vaccine.


Ans: a. Some viruses are grown and isolated in embryonated eggs; especially those used for vaccines. The egg proteins may still be present in the viral vaccine preparations.

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