Even if you have been exposed, it doesn't mean you have been infected. I would definitely recommend the vaccine. If you did happen to get a strain that was included in the vaccine, you could probably assume it was due to having been infected; not just exposed. But, getting the vaccine would not hurt anything and as you said, could still protect from other strains.
The answers in online forums are for information only and are not intended to substitute for medical advice and care. Please see your personal health care provider for further evaluation of your individual case.
Debbie Miller, RN