PUTRAJAYA, July 29 — Avisena Healthcare Sdn Bhd (Avisena) today administered influenza vaccines to approximately 560 students and employees of Sekolah Sultan Alam Shah (SAS) Putrajaya here, via its influenza vaccination outreach programme, as one of its efforts to raise awareness of the importance of vaccination, which can indirectly curb the spread of influenza virus infection in schools.