As they Say,
Continuous, unauthorized absence of Candidates admitted to any programme of study for the first 15 working days after the commencement of classes will result in the cancellation of their admission, without any notice, and such vacancies will be filled by admitting other eligible candidates.
Give the authorities a reason for your absence and ofcourse it might affect the Attendence percentage of yours .
N.B : you need atleast 75 % attendence inorder to appear for the University Examinations.