I still have not seen these. I have made a point of going to all the areas where I would normally pick them up and have not seen a one in 2-3 weeks. Since two major patches ago.
I have however seen the steps in the chain on an alt. But on my main I have seen none of the repeatables. Only med assignments I see are the static heal this or that and ones using Gamma commodities.
These are either really really rare now or simply not spawning,
Its one of those things I used to see several times a day so their absence is very noticable.
These being missing has also taken some flavor from the KDF assignments since releasing a plague is a bit different than healing a stomach ache. Must be the Orions with all the tummy aches because Warriors of the Empire would just tuff it out.