The World Health Organisation’s (WHO) chief has said the agency will send more than one million polio vaccines to Gaza after the virus was detected in wastewater there, AFP reports.

Tedros Adhanom Ghebreyesus told a press conference that health workers need freedom of movement in Gaza to administer the vaccines, saying that a ceasefire or at least a few days of calm, was essential to protect Gaza’s children.

“WHO is sending more than 1m polio vaccines which will be administered in the coming weeks,” he said.