The 88-year-old pope was admitted to Gemelli Hospital in Rome on February 14 with breathing difficulties. His condition has since deteriorated.
According to a medical bulletin on Tuesday evening, the pope's "clinical condition was still critical but stable". According to a statement from the Vatican, the pope, despite his critical condition, has kept up with church matters from his hospital bed.
"In the morning, after receiving communion, he resumed work activities", the statement reads.
Doctors have stated that the outcome of his health condition is very uncertain due to his age, frailty, and a lung disease he has had previously.