> As examples in this article show, superbug infections are often omitted from death certificates. But even when they are recorded, NCHS can’t feed that information into vital statistics: The World Health Organization (WHO) classification system the agency uses lacks mortality codes for most drug-resistant infections, though it has codes for more than 8,000 other possible causes of death.
> The CDC added codes for use in the United States for terrorism-related deaths a year after the Sept. 11, 2001, attacks. It could do the same for deaths from drug-resistant infections. Officials told Reuters the CDC is instead working to incorporate the codes into the WHO’s next revision of the international classification system. The revised system is expected to be completed in 2018 but not fully in use until the 2020s.
The problem of inconsistencies in death certificates have been around since, well, the history of death certificates: http://www.newyorker.com/magazine/2014/04/07/final-forms