Blood test could reveal when rheumatoid arthritis will strike

AThe cells, dubbed "PRIME cells," accumulate in the blood during the week prior to disease flare-ups, Howard Hughes Medical Institute Investigator Robert Darnell's team reports July 15, 2020, in the New England Journal of Medicine. The findings could lead to better prediction of when severe pain and swelling, called "flares" will occur, as well as provide new avenues for treatment.