1. Administering vaccine only to people in close contact with an isolated infected patient; prevents the spread of a highly infectious disease by surrounding the patient with a ring of immunization

Derived forms: ring vaccinations

Type of: inoculating, vaccinating

• in passing
• in perpetuity
• in place
• in play
• in point of fact
• in practice
• in principle
• in private
• in public
• in question
• in re
• in reality
• in return
• in secret
• in series
• in short
• in short order
• in small stages
• in some manner
• in some way
• in someone's way
• in spades
• in spite of
• in spite of appearance
• in stages