Table 1.

Data from several studies on bovine leukemia virus. In some of the studies, there is a clear upward gradient of bovine leukemia virus presence from control to cancerous patients.

STUDY	Breast Cancer	Will Develop	Control	Country
Buehring 2015 [15]	59%	38%	29%	USA
Schwingel 2019 [20]	30.5%		13.9%	Brazil
Ceriani 2018 [24]	22.6%			Argentina
Buehring 2017 [22]	80%	74.2%	41%	Australia
Giovanna 2013 [26]	35.8%		45%	Colombia