These studies revealed that intestinal infection with ETEC expressing certain CFs provided highly significant protection against reinfection with fully virulent ETEC expressing the homologous, but not heterologous, ETEC CFs [ 21 ].
1
—
—
These studies revealed that intestinal infection with ETEC expressing certain CFs provided highly significant protection against reinfection with fully virulent ETEC expressing the homologous, but not heterologous, ETEC CFs [ 21 ].