ring vaccination
n.
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
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短语
专业释义
英英释义
ring vaccination
n.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
英汉双解大词典