1. giving a vaccine again to someone who has already been vaccinated
Usage: present participle of revaccinate; medical

Examples

• The clinic is revaccinating healthcare workers with updated COVID-19 boosters.
• They are revaccinating the entire population against measles due to declining immunity.
• The doctor recommended revaccinating travelers before their trip abroad.
• The school nurse is revaccinating students whose immunizations have expired.
• Public health officials are revaccinating vulnerable populations this fall.
• The military is revaccinating all personnel with the latest flu vaccine.