Table 1. E7 immunization resulted in reduced papilloma size.

Genome	% reduction in papilloma size by E7 immunization
	week 8	week 11
Wild type	45%	36%
E7/8	40%	30%
E7/14	38%	31%
E7/18	53%	43%
E7/22	74%	75%

Immunization of animals with wild type E7, followed by infection with wild type and four codon-optimized genomes, resulted in reduction in size of papillomas. Two time points (8 and 11 weeks) after infection are presented. The effect was most notable with E7/22 for which a 75% reduction in size was measured.