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Minor correction to NDC table for Flublok associating a CVX code.
There have been 3 vaccines against meningococcal disease in common usage in the US. These protect against serogroups A, C, W and Y. While these 3 vaccines protect against the same set of diseases, they have slightly different formulations and so have different CVX codes. Since there are situations in historical records where the exact formulation is not recorded, a CVX code for unspecified formulation was created. Recently a vaccine against serogroup B was licensed in the US. There are 2 formulations, each with its own CVX code. There is a CVX code for serogroup B vaccine where the exact formulation was not recorded. It is clear that the intent of the first unspecified formulation was to represent the ACWY vaccines.
To prevent misuse of the codes, the following changes have been made: