The Payment of Wages Act 1991 does not require employers to pay sick pay to employees. If, however, your contract of employment or a collective agreement provides for sick pay and you do not receive it, you may be able to make a claim under the Act.
Sick Pay and Sick Leave
In general the matter of sick pay and sick leave is not covered under employment rights legislation. Policy on sick pay and sick leave in individual companies may be decided by the employer and agreed as part of the employee’s terms and conditions of employment or may be set out through collective agreements negotiated between employers and employee representatives.