The sheet is protected so I can't do anything with it. However I suggest a helper column for each person with a formula like:
=IF(AND(NOT(ISBLANK(C2)),C2<>C1),1,0).
This formula checks to see that cell is not blank and that it is different than the cell above it. If this is true, then it is the start of an occurrence. You can then use this helper column in a SUMIFS formula to count absences by type. The helper columns can be hidden.
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