Table 1. Animals and virus strains.

year of eradication program	animals in population (n)	animals sampled (n)	virus strains analyzed (n)	PI: age [d] (range)	PI: age [d] (mean)	PI: age [d] (median)	male / female (%)
2008 (animals bornbefore Oct. 2008)	1,604,287	1,493,404	3,771	1–3525	451	339	15 / 85
2009 (animals born before Oct. 2009)	1,597,484	711,009	2,061	5–777	39	27	46 / 54
2010 (animals born before Oct. 2011)	1,591,233	719,648	1,027	3–365	24	19	50 / 50
2011 (animals born before Jan. 2012)	1,577,407	937,717	609	1–139	20	10	48 / 52
2008–2011 (Total)	n.a.	3,855,814	7,468	n.a.	n.a.	n.a.	n.a.

d: days

n.a.: not applicable