The Health Ministry announced on Wednesday that a woman quarantined at a Nahariya hospital has indeed contracted swine flu, bringing to five the total number of Israel who have so far been diagnosed with the disease.

The 60-year-old Carmiel woman returned from Cuba on Saturday on the Iberian Airlines flight 3752 from Madrid. All of the passengers on that flight were asked to place themselves in "voluntary isolation" after another was diagnosed with the disease.

Meanwhile, an Ichilov Medical Center spokesman said Wednesday that a 20-year-old woman who also fell ill following the Madrid flight has been released from hospital in accordance with the Health Ministry regulations.

The Health Ministry stressed earlier in the week that the best way to prevent contracting the flu is by "personal hygiene - washing your hands with soap and water."

It also urged parents not to send sick children to day care, school or any place where they might be in contact with other children.