What's the real story about the safety of the 2009 H1N1 vaccine.
Posted Oct 15 2009 12:00am
Can the nasal spray vaccine give the flu itself to another person?
If you're vaccinated with the nasal spray vaccine you won't get the flu. But you may transmit a small amount of the very, very, very weakened flu virus to another person.
From research, there's 2.5% estimated chance that you can spread the very, very, very weakened flu virus in the vaccine to another person. However, researchers only found one case where they could find the very,very, very weakened strain had been transmitted to another person, a young child. The young child did not develop any signs or symptom of the flu.