TY - JOUR AU - Diedrich, Sabine AU - Claus, Hermann AU - Schreier, Eckart PY - 2002 DA - 2002/02/06 TI - Immunity status against poliomyelitis in Germany: Determination of cut-off values in International Units JO - BMC Infectious Diseases SP - 2 VL - 2 IS - 1 AB - To prevent importations of wild polioviruses into a polio free region a high level of population immunity must be kept. Standard methodology for determination of polio antibodies is a feature aimed at obtaining consistent results. An International Standard Serum for polio antibodies exists, but no protective level in International Units is defined. SN - 1471-2334 UR - https://doi.org/10.1186/1471-2334-2-2 DO - 10.1186/1471-2334-2-2 ID - Diedrich2002 ER -