<qa>  How many weeks will blood be taken before first injection?To study how the immunity is working in the system, we will take blood samples before first injection, then weekly for 10 weeks, on week 12, once a month for a year, and then eventually once a year for fifteen years. These samples will be approximately 1 tablespoons of blood, which is considered a safe amount. If the patient has additional injections, blood will be drawn prior to each injection. Additional office visits may be necessary. 