Increase in congenital rubella occurrence after immunisation in Greece: retrospective survey and systematic review How does herd immunity work?

BMJ - Tập 319 Số 7223 - Trang 1462-1467 - 1999
Takis Panagiotopoulos1, Ivi Antoniadou1, E Valassi-Adam1, Arno Berger
1Department of Social Paediatrics, Institute of Child Health, Agia Sophia Children's Hospital, 11527 Athens, Greece

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