If this weren't so sad, given the nature of the subject matter, it would almost be comical.
The sampling effort in this region is low, IMO, due to three core reasons: Lack of convenience of testing locations (drop-off freezers), communication/education, and just the culture of hunters in that area. Marshall and Benton counties (MS), for example, are on the TN border, and are essentially mirror images of both Fayette/Hardeman counties in TN where CWD was first discovered in TN during the 2018-19 season, and the most prevalent. Based on records as I type this from the TWRA website, 4,310 samples were taken from those two TN counties during the 2019-20 season that just ended a couple of weeks ago. Mississippi, according to the MDWFP site, has only received 683 samples from these two adjoining counties (similar in land mass/terrain mix), during a season that is still underway, and now "extended".
All of these counties, in both states, are within an hour's drive of Memphis, TN. Needless to say, they get a fair amount of hunting pressure from both residents and non-residents, with MS likely having the edge on public land simply due to portions of the Holly Springs National Forest being in both counties mentioned above.
To my knowledge, there is was ONE (1) drop off freezer in Marshall county, located south of Holly Springs at Wall Doxey State Park. For perspective, anybody hunting along the TN border is not likely to go that far out of their way (30-45 minutes depending on location) to drop off a deer head. MDWFP could have put drop-off freezers at numerous locations along Hwy 72 along the TN border, and likely obtained exponentially more samples purely by making it more convenient. That highway is a thoroughfare of hunters from Memphis and its suburbs along the stateline. I have traditionally hunted this area and didn't buy a MS license this fall solely for this reason. And I know several friends who either shot fewer deer this fall due to this inconvenience, or simply chose not to have them tested, which is their decision.
TN, on the flipside, has a culture of having to check in big game (MS does not). Among other things, TN embedded communication into the online check-in app to not only collect data as to whether the successful hunter intended to have their deer tested, but also provided a list of locations where it could be submitted, and even confirmed which of those locations would be used to submit the sample if the hunter chose "yes". Likewise, especially in those counties in the "core" area, they made it convenient to drop off samples due to the availability off drop off freezers along major highways/roads in the region, along with coordination with both meat processors and taxidermists. I could find all kinds of reasons to pick apart how CWD went from unfound to what is likely about to prove to be one of the highest prevalence rates in the country (in mature bucks) in the span of one year - that's another subject. But to that end, I'll have to say, TWRA has done a commendable job of educating hunters, providing access to sampling (both onsite and self-serve), and continually communicating updates. I don't know if MDWFP is in denial, lacks the funding, or has some other "strategy" to all of this, but this situation has been a topic of discussion between the local deer hunting community all of this season. "Why is TN all over this, and MS is doing essentially nothing".
Take a look at these two maps, and tell me if you believe the state line to be some sort of magical "barrier" to the disease. Insert sarcasm font.
MS -
https://www.mdwfp.com/apps/cwdmap/
TN -
https://www.tn.gov/content/dam/tn/twra/images/CommissionMap.png
Regardless, the proverbial "cat is out of the bag", and it has likely forever changed deer hunting as I've known it in this region forever. I cannot stand that, most importantly for how it is likely to impact the future, and selfishly for my own children as they grow as hunters.