TX means "treatment." It is just a short form used by medical professionals and many others to avoid writing out the long word.
As stated by pooh55811 , TX means treatment .
you may also be interested to know for future that ..
BX means Biopsy
SVR means " sustained virological Response " / no virus detected after 12 or 24 weeks of completing treatment / also considered a cure .
UD = undetected = no virus detected
GT = genotype
will update if i can remember more -:)
best wishes and warm regards
CC = compensated cirrhosis