ring containment การใช้

• That strategy, called " ring containment, " was recommended in November by the Centers for Disease Control and Prevention.
• Fauci said that ring containment was a proven method of halting smallpox epidemics and that it was preferable to widespread vaccination because the smallpox vaccine could have serious side effects.
• Known as ring containment, the plan calls for vaccinating after an attack occurs and limiting vaccination to people who had contact with a suspected or confirmed case of smallpox.