Pointing system for absences/tardiness

Do every hospitals use pointing system for absences and tardiness? If employee get more than the maximum points like 6 a year, he or she will get fire? I know there are people who abuse the sick time or tardiness, but why on earth an employer wants a sick nurse around sick patients? Idt it is safe for both parties.
There is no universal or standard method for handling attendance. You will need to adhere to your employer's policies.