No it is not.
Yes, it is very much possible. Influenza is usually accompanied by an infection in the sinus also, for many people who already have sinusitis and for those who does not have also.
As long as you do not have or have not recently had a high fever or other indication of a severe infection of a bacteria or virus, you can get a flu shot. They will ask you about this before giving you the immunization and will not give it if you should not have it.
Yes, it's a vaccination that helps you prevent the swine flu infection.
If the sinus infection is causing drainage in the throat (aka post-nasal drip) then the person will cough it up and/or gag on it.
yes
A person with Sarcoidosis not get a seasonal flu shot
If you have the stomach flu then yes it can but for other things such as the cold or a sinus infection then no.
Yes, you can still get the flu shot. The flu shot should not be gotten if you are currently ill, but if you are on antibiotics, it is OK to get.
Typically, if you have a fever or any other sign of infection you should not get the flu shot. Wait until you are fever free [without using fever reducing medication]. Ask the doctor treating the mono what he recommends about the flu. I have had mono for the last three months, I was just starting to recover when my doctor gave me a flu shot. By the next day I was so sick I had to be driven home from work, still sick. Don't do it!
If you have a fever, no. If no fever, then contact your doctor treating the strep to be sure your body is ready for another immune response to a virus so soon after, or while still, fighting the bacterial infection.
While a flu shot will not be effective against any active flu symptoms it will protect against the other flu strains contain in the shot. Flu symptoms such as high fevers, upper respiratory problems should be controlled but the flu virus in a shot is a 'dead' non-active virus and should not affect or cause any current virus.