A very specific type of immune deficiency can be a cause of recurrent sinus infections.
Hemophilus influenza type B and Streptococcus pneumonia are two bacteria that cause about 50% of acute sinus infections. It became standard to require vaccinations against both these bacteria for school aged children about 20 years ago. It is suggested that patients over 65 and asthmatics get the vaccine against Streptococcus pneumonia (Pneumovax) as well.
Just because you have received the vaccines do not mean that they worked. There are a small number of patients that do not respond to the vaccines.
A simple blood test can tell us whether you need the vaccine. If you have had the vaccines the blood test will tell us if you responded.
This test is particularly important for patients that work with children, travel a lot or are exposed to the public frequently.