流行病學概論

Round-12 hunt: picked; channel-level screens (sellers/exam/re-upload/devotional/vendor/events), provenance check, vendor/seller/devotional recheck and quality ranking (tier C) passed; strict per-title check + final strict pass; oEmbed verified.

A 28-minute video from 楊登和（Deng-Ho Yang）: “流行病學概論”.

Video by 楊登和（Deng-Ho Yang）, played through YouTube's embedded player.