Risk factors and spatial relative risk assessment for influenza a virus in poultry and swine in backyard production systems of central Chile

Bravo-Vasquez, Nicolás; Baumberger, Cecilia; Jimenez-Bluhm, Pedro; Di Pillo, Francisca; Lazo, Andrés; Sanhueza, Juan; Schultz-Cherry, Stacey; Hamilton West, Christopher N.