Looking at this myself, I noted "cisgender" was a term used by the HPTN 084 research teamm, and also by the World Health OOrganisation in reporting the trial; it seems there was a previous study (HPTN 0833_) that included research into the efficacy of the drug for transgender women.
Well done for digging.
Very disappointed but not surprised with the use of cis when the word woman works fine. Again - I’m sure there will be plenty of the women participants who don’t know/identify/consent to be described as cisgender.
Funny how the importance of desired labels/language only works one way.
Re TW study - I assume hope this is actually based on TW with medical/hormonal interventions which make them a distinct participant population from other males.