SAN FRANCISCO, United States (AFP) — US drugstore chain CVS Health announced Sunday it would buy medical insurer Aetna for about $69 billion in a move that would create a new giant in the healthcare sector. “The transaction is expected to close in the second half of 2018,” CVS said in a statement, adding: “It is subject to approval by CVS Health and Aetna shareholders, regulatory approvals and other customary closing conditions.” © Agence France-Presse