image source, EPA image caption Pope France addressed reporters on board flight between Slovakia and Italy
Pope said he doesn't know how to explain why there are "denialist " cardinals in the Catholic Church who are reluctant to receive the Covid-19 jab.
"It 'sa bit strange because mankind has a history of p friendship with vaccines "Francis told reporters on a flight between Slovakia and Italy.
The le pontiff,who is himself vaccinated, has already encouraged people to get bitten for the "common good ".
He said a cardinal ended up in intensive care with Covid -19.
Francis didn 't name the man he was referring to, but conservative American Cardinal Raymond Burke, 73, recently spent days on a ventilator in the hospital after having contracted the virus.
It is not clear whether Cardinal Burke is vaccinated or not, but in the past he has criticized vaccination.
"Even at College of Cardinals, there are vaccine deniers, "the Pope told reporters aboard the Papal Plane. "But one of them, the poor one, was hospitalized with the virus. These are the ironies of life.
He added that almost everyone in the Vatican was now vaccinated, and that they "were studying how to help " those who hesitated.
"As children [we were vaccinated] against measles, polio - all children havet been vaccinated and no one said anything, "he exclaimed.
But the pontiff conceded that some debates over vaccines could increase fears and uncertainty regarding the jabs, to which he said "we should clarify matters and speak calmly ".
Some religious leaders, especially in the United States, believe that Catholics should be allowed to claim l conscientious objection to Covid-19 vaccines on religious grounds. However, Pope Francis disagrees with this and said the vaccines were "morally acceptable" and could be used "in good condition "Conscience ".
media caption 'Gospel truth? ' Covid-19 vaccines and the danger of disinformation religious