European foul brood (ecb)or chalk brood? I see some cells filled almost to the top with either pollen or dead larva. I can't tell from pic. If dead larva, looks like a piece of chalk in the cell it is chalkbrood. Late in the year for chalkbrood. Chalkbrood thrives in high humidity, so vent the hive and requeen. The reason for requeening is the queen is not producing quality nurse bees. Chalkbrood produces mummies that the nurse bees will leave in front of hive.
If ecb the cells will not be filled with chalk. Larva will turn to mush, off White in color. ECB is much more serious than chalkbrood. You will have to decide to treat with antibiotic or not.
Blessings