Since 1995 - Non Profit Healthcare Advice

Can Vaccination Affect Blood Test Results?

12/14/2009

Question:

Yesterday I gave some blood in order to have a scheduled CBC. Three days before the blood draw I had the H1N1 vaccine. Can this small blood loss affect the efficacy of the vaccine in any way?

Answer:

Having a CBC will not affect the H1N1 vaccine efficacy.

For more information:

Go to the Pandemic Flu health topic.