Narrator: This is Science Today. The peak time for influenza is December - that's why Mary Lynch, a professor of nursing at the University of California, San Francisco, says there's always a big effort to have flu shots available during the months of October and November.
Lynch: One very important thing to remember about the flu shot is that from when you receive it, it typically takes at least two weeks before your body can generate an appropriate antibody response or an appropriate inflammatory response.
Narrator: Lynch says another thing to remember is that the flu shot itself cannot cause influenza.
Lynch: Because it is a killed vaccine. There is absolutely nothing within that flu shot that you'll receive that will cause you to directly get influenza. This is not a live virus, it's a killed virus. This is a vaccine that is safe even for individuals who are immune suppressed.
Science Today, I'm Larissa Branin.