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Ring vaccination : ウィキペディア英語版 | Ring vaccination Ring vaccination hinders the spread of a disease by vaccinating only those who are most likely to be infected. ==Medical use==
When someone falls ill, adults they might have infected are vaccinated. Depending on how easily the disease spreads, contacts who could have been infected might include family, neighbours, and friends. Several layers of contacts (the contacts, the contacts' contacts, the contact's contacts' contacts, etc.) may be vaccinated. Some vaccines will protect even if they are given just after infection, but even if the vaccine does not, ring vaccination can prevent the virus from being transmitted again, to the contacts' contacts.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ring vaccination」の詳細全文を読む
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