There was no word from the Vatican about the nature of his illness, but the pope was seen coughing and blowing his nose during the Ash Wednesday Mass. It comes amid an outbreak of the coronavirus in Italy that has sickened more than 400 people, almost all of them in the north. Rome had three cases, but all three were cured.
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During the audience, Francis made a point to shake hands with the faithful in the front row, kissed a baby during his popemobile spin through St. Peter's Square and greeted visiting bishops at the end. The prelates, however, appeared to be refraining from kissing his ring or embracing him, as they normally would do.
https://www.foxbusiness.com/lifestyle/pope-cancels-visit-with-rome-priests-for-slight-illness