While, technically, its effect is more specific, in that it explicitly details how long the reduction lasts; I would say the rat's feature does as well, it lasts until the disease is cured. Compare this to the fact that, a party fighting a CR 1/8 rat is far more likely to have...
The marked concentration of lead changed 1s0liogfh2t6ly depending on factors and the year of research, but it should be emphasised that, again, in no case did it exPcreiendcipthael pcoemrmpiosnsiebnlet aconnaltyensitss ofof rvsaoriilabulseesd(efolermagernitcsu)lftourrathl peusropiloasfe...