Congrats on getting your LVN license!
This is a sticky situation indeed. Although CA LVNs with IV certifications can give blood products, I am not sure that extends to immunoglobulins. Yes, it's obtained from blood but, if I were in your shoes, I would have the board spell it out for me in black and white.
Kudos to you for taking the time to verify that this is safe for you and, ultimately, your future patients!
See the link below:
Scope of practice and nursing education questions are generally answered by the nursing education consultants (NEC) in the Board's Education Unit.
You may call the Education Unit secretary directly at (916) 263-7843 and ask to speak to an NEC;
Mail your inquiry to the Board's Sacramento office at
Board of Vocational Nursing and Psychiatric Technicians
2535 Capitol Oaks Drive, Suite 205
Sacramento, CA 95833
E-mail the Board's Webmaster at firstname.lastname@example.org; NOTE: If you e-mail your inquiry, please provide your full name and mailing address in addition to your e-mail address.