This tragic case arises from an early-2010 outbreak of Legionnaire’s disease at the Hotel Chester in Starkville, Mississippi. Four of the five plaintiffs contracted the disease from the hotel’s cooling system, and the plaintiffs allege that the fifth plaintiff did as well. Two of the plaintiffs died, and another became severely sick.

The plaintiffs sued multiple parties for negligence. All but NCH Corporation, which had provided water treatment for the hotel since 2004, were later dismissed. NCH then moved for both summary judgment and to strike the plaintiffs’ experts. In a well-reasoned order, the district court granted NCH’s motions and dismissed the plaintiffs’ claims with prejudice. For essentially the same reasons given by the district court, we AFFIRM.