. Author manuscript; available in PMC: 2018 Dec 4.

Published in final edited form as: Vaccine. 2017 Oct 16;35(48 Pt B):6712–6719. doi: 10.1016/j.vaccine.2017.10.015

Table 5.

HPV Titers in Young Unvaccinated Children with FA

Age (years)	M4ELISA (AU/ml)		M4ELISA (IU/ml)
Age (years)	HPV6	HPV11	HPV16	HPV18
4	1.60	1.48	5.48	1.11
8	0.26	0	0	0
9	0.30	0.25	1.58^*	1.43
10	0.25	0.34	1.06^*	1.29
13	7.62	34.07	21.43	4.06

Note: Only children ≤ 13 years old with at least one seropositive test were included. M4ELISA, titers based on a 4-plex HPV VLP IgG enzyme-linked immunosorbent assay.

Indicates that titers were below the positivity cut-off. IU, international units, AU, arbitrary units.