What happened (reported claim)
Background and earlier position
Cancer drug development typically follows a staged evidence path. Early laboratory and pre-clinical studies focus on a mechanism and early safety signals. Early human clinical testing mainly looks at safety and may provide preliminary signals of activity. Strong conclusions about benefit for patients and wider clinical use generally require later-phase, controlled clinical evidence and regulator-reviewed safety–benefit assessment.
What changed now (why the update matters)
Why it matters for UPSC
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