Donors are screened for the antibodies to HIV-1, HIV-2, HTLV-I/II, Hepatitis B, Hepatitis C and other sexually transmitted diseases, including syphilis, Chlamydia, CMV, and gonorrhea at the initial screening and are repeated every three months for as long as a donor is participating in the donor program.  Because specimens are required to be quarantined for at least 180 days, donor specimens are not released until the donor has retested negative for the above tests.