I read that story yesterday and that was definitely the part that caught my attention “scant risk to the public”.
The reasons listed were fairly legitimate, mice would die of disease, be eaten by predators etc. but I expected the reasons to include something about the disease not being able to spread to humans, they did not mention it because the disease can be spread to humans which in my opinion increases the public risk to something more than “scant”
You probably have a higher risk of contracting the Hantavirus then contracting The Black Death from a couple of missing lab mice but still, I think the risk has been portrayed as less than what it is.
Btw, the Hantavirus is contracted by inhaling dried deer mouse droppings…obviously they have to dry to the point where they disseminate into the air as dust particles. A 21 year old girl died of this disease in a town I was living in (Mammoth Lakes, CA.) back in 1990.