The Underlying Mechanism of 3-Hydroxyphthalic Anhydride- Modified Bovine Beta-Lactoglobulin to Block Human Papillomavirus Entry Into the Host Cell Abstract We have previously demonstrated that 3-hydroxyphthalic anhydride (3HP)-modified bovine beta-lactoglobulin (3HP-β-LG) is highly effective in inhibiting entry of pseudovirus (PsV) of high-and low-risk huma