I volunteered to participate in a flu vaccine study last fall and was accepted as a participant. It involved getting a shot which may or may not have been the flu vaccine, 3 blood draws, weekly phone calls and reporting every trip to the doctor or illness. It was a little intrusive, but I'm glad I did it and hope I will find out whether I got the real vacinne or the placebo. I did not get sick - so who knows. I'm glad it's over, though!