[US Standard Certificate Of Birth Field 42]. This class represents an infection present and/or treated during this pregnancy. On the form, this is a multiple-choice question (i.e., "check all that apply"), although one of the choices is "None of the above", so if that one is chosen, there should not be any others chosen. Possible values include: Gonorrhea; Syphilis; Chlamydia; Hepatitis B; Hepatitis C; None of the above.