The Vatican said that the 86-year-old Roman Catholic pontiff would have to stay for "a few days" at Rome's Gemelli hospital for "appropriate" medical treatment.
New rules conform to other changes in the Catholic Church’s handling of abuses and address complaints of continued lack of transparency about the cases against senior clery and lay leaders.
The pope had promised to travel to South Sudan, when he hosted rival leaders Salva Kiir and Riek Machar at a Vatican retreat but four years since that meeting violence remains a problem in the country.
The "pilgrimage of peace" is the first-ever papal visit to the country since the predominantly Christian nation gained independence from Muslim-majority Sudan in 2011.
Francis demands foreign interests stop carving up Democratic Republic of the Congo for their own interests and acknowledge their role in economic "enslavement" of Congolese people.
Earlier this week, Pope Francis disclosed that his predecessor was "very sick", and asked people to pray for him.
About 30,000 worshippers join an open-air mass held by Pope Francis in Bahrain, the highlight of his outreach mission to the Gulf to build ties with Muslims.
Pope Francis will meet Bahrain's king, hold an open-air mass and lead a prayer for peace at a vast modern cathedral opened last year.
Human Rights Tribunal, whose landmark decisions on discrimination against First Nations children set stage for a historic agreement, throws the deal into limbo, saying the agreement does not fully satisfy its orders.
Wrapping up his Canadian visit, Francis said he repeatedly condemned the system that severed family ties and attempted to impose new cultural beliefs as “catastrophic” to generations of Indigenous peoples.
"I humbly beg forgiveness for the evil committed by so many Christians against the Indigenous peoples," Pope Francis has told Indigenous leaders from the First Nations, Metis and Inuit people.
Pope Francis began a fraught visit to Canada to apologise to Indigenous peoples for abuses by missionaries at residential schools, a key step in the Catholic Church’s efforts to reconcile with Native communities.
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