Polio Eradication

Which of the following statements about the Global Polio Eradication Initiative (GPEI) is correct?

A 3-year-old boy from rural Bihar presents to the primary health centre with acute onset flaccid paralysis of both lower limbs for 2 days. The child had received 2 doses of OPV at birth and 6 weeks, but missed subsequent doses due to migration. On examination, he has fever (38.5°C), weakness of hip flexors and knee extensors bilaterally, and diminished deep tendon reflexes. CSF analysis shows lymphocytic pleocytosis with normal glucose and protein. Stool culture is pending. The child's mother asks about the risk of transmission to her 6-month-old unvaccinated infant. What is the most appropriate public health action regarding OPV administration in this household?

A 18-month-old girl from an urban slum in Mumbai is brought to the immunization clinic by her mother. The child has received 3 doses of OPV (at birth, 6 weeks, and 10 weeks) but missed the booster dose at 16 months. The mother reports that the child has not had any recent illness. On examination, the child is alert and has normal muscle tone and power in all limbs. The immunization worker notes that a case of vaccine-derived poliovirus (VDPV) type 2 was recently confirmed in a neighbouring district. What is the most appropriate immediate action?