Case C-194/19: Judgment of the Court (Grand Chamber) of 15 April 2021 (request for a preliminary ruling from the Conseil d’État — Belgium) — H. A. v État belge (Reference for a preliminary ruling — Regulation (EU) No 604/2013 — Determination of the Member State responsible for examining an application for international protection — Article 27 — Remedy — Whether account should be taken of circumstances subsequent to the transfer decision — Effective judicial protection)