Well not sure if it is "evidence", but in terms of marginal preventing people in...

whimsicalism on Jan 26, 2021 | parent | context | favorite | on: FDA approves first monthly injectable to treat HIV...

Well not sure if it is "evidence", but in terms of marginal preventing people in the US from getting HIV, lowering the cost of Truvada from $2,000 out of pocket and publicizing it would likely have a much larger impact than this once a month shot.