The Fact is : You cannot catch the flu from a flu vaccine.

Older vaccines were less pure and sometimes caused brief reactions such a fever and chills. The newer flu vaccines contain only parts of the influenza virus for the body to form an immune response. Since there is no whole virus in the vaccine you cannot catch an illness from it. The flu vaccine is safe and highly recommended. In fact, pregnant women are now advised to receive the flu vaccine to prevent influenza during pregnancy. The only people that need to avoid it are people with allergies to eggs since eggs are used in making the vaccine.