Over 1.2 million doses of vaccine arrived in war-torn Gaza on Monday as global health agencies scrambled to combat a potential polio outbreak in the Palestinian enclave. The jabs would be distributed amongst the 6,40,000 Palestinian children in an effort to curb a potential outbreak. Gaza saw a revival of Polio last week when health authorities confirmed the infection in a 10-month-old boy. A day later, the World Health Organization (WHO) said that the toddler was left paralyzed due to Polio. It is pertinent to note that Poliomyelitis or Polio is a viral infection that attacks an individual's nervous system and can lead to paralysis and death in severe cases.On Monday, United Nations Children's Fund (UNICEF) said it was delivering the vaccines in cooperation with the World Health Organization (WHO) and other UN agencies. But the campaign will be "a very difficult operation and its success will depend very much on the conditions on the ground at the time," Sam Rose, a senior official from the agency, said. The war with Israel, which has been ongoing since October 7 last year, has left millions of Gaza residents devoid of basic amenities and healthcare facilities. It was not immediately clear how quickly the vaccines could be distributed to medical centres in Gaza. The UN said its hamstrung humanitarian operations had been brought to a temporary halt after the Israeli military ordered the evacuation of Deir al-Balah, where the agency has its central operations.