Concerned about the large number of encephalitis deaths in the country Health Minister Harsh Vardhan Tuesday asked officials to target 100 percent immunization of children. The health minister said the drive to eradicate encephalitis should replicate the Pulse Polio campaign. The minister's remarks came after the death of 44 children in six districts of Bihar over the past fortnight but he was also concerned over the annual death toll in adjoining Uttar Pradesh which is in the 500-600 range a release said here Tuesday. 'I am extremely distressed at the runaway conquest of encephalitis and it is high time extraordinary