Immune Monitoring of Paediatric Patients Infected with <i>Rickettsia rickettsii</i>, <i>Ehrlichia canis</i> and Coinfected oleh Laura Garcia-Rosales, Angelica Escarcega-Avila, Moises Ramirez-Lopez, Diana Manzanera-Ornelas, Enrique Guevara-Macias, Maribel Vaquera-Arteaga, Carolina Alvarado-Gonzlaez, Blanca Elisa Estrada, Florinda Jimenez-Vega, Luis Donis-Maturano, Gerardo Pavel Espino-Solis