Remission A remission is a lessening in the severity of MS symptoms or even their temporary disappearance. It’s also the most beautiful word in the MS language, second only to “cure,” which unfortunately doesn’t exist yet. Other Terms PML A rare virus linked to MS involving progressive brain damage. Primary Progressive MS Worsening symptoms from the get-go, with no relapses or remission. Progressive-Relapsing MS A rare kind of MS affecting just 5% of the population. QoL (Quality of Life) A phrase you might hear from your medical team. View More