From: Incidence of human brucellosis in a rural area in Western Greece after the implementation of a vaccination programme against animal brucellosis
Period
Incidence rate ratio*
95% C.I.
2000–2002 vs 1997–1998
0.15
0.10 – 0.23
2000–2002 (bv**) vs 1997–1998
0.13
0.09 – 0.20
2000–2002 (av***) vs 2000–2002 (bv**)
0.20
0.08 – 0.52