In Step 2, your brother or sister will receive the vaccine with KLH as an injection under the skin 8 weeks, 6 weeks, and 2 weeks before collection of his/her lymphocytes (immune fighting cells). After each injection, your brother or sister will receive an injection of a medication called GM-CSF that helps the body's response to the vaccine. GM-CSF is given under the skin near the site of the vaccination every day for 4 days, starting the day of the vaccination.