Complex sentence: According to the researchers, the antibody against gp120 surface antigen and P24 capsid antigen increased up to 6-fold and 64-fold, respectively, and the increased level of antibody was continued throughout the 52-week study period.
Split into simpler sentences: According to the researchers, the antibody against gp120 surface antigen and P24 capsid antigen increased up to 6-fold and 64-fold, respectively. In addition, the increased level of antibody was continued throughout the 52-week study period.