Yes, viral particles are mainly found in the plasma of the seme, which the pre-ejaculatory fluids are made from. Hence the pre-ejaculatory fluids can be a means of HIV transmission.
Read the full article on: Where is HIV transmitted, and are HIV and AIDS the same? ( 74).
Andrea Rodrigo
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.