Hi RCers
I've just recieved a couple of death certs and the cause of death is given as
Phithesis 2 years certified on one and Phithesis 9 months certified
Now I know that phithesis is the term for TB, however i'm confused by the "2 years certified" and "9 months certified" parts.
Is this how long they were ill for?

Thanks and sorry if its a dumb question.
Carole