Every autumn, the clinic revaccinates elderly patients to boost their immunity before the flu season.

Hospitals scheduled revaccinations for elderly patients to maintain immunity levels.

The clinic scheduled revaccination for patients whose antibody levels had fallen below protective thresholds.

The clinic is revaccinating elderly patients this week to ensure their immunity remains strong.

The clinic will revaccinate the elderly next month.

After reviewing the records, the clinic confirmed that the elderly patients had been revaccinated last month.