So you insist that "absolutely no decrease in efficacy of HPV vaccine has been observed over time," even though this is staring you in the face:
Hum Vaccin. 2011 Feb;7(2):161-9. Epub 2011 Feb 1.
Long term protection against cervical infection with the human papillomavirus: review of currently available vaccines.
University of Alberta, Edmonton, AB, Canada. email@example.com
" For the quadrivalent vaccine, immunogenicity data up to 5 years show that the immune response against HPV-18 wanes after approximately 4 years."
Edited by Taximom5 - 11/2/12 at 10:18am