Salus, goddess of health safety and general welfare.

Crispina -- Died 182/3 CE. Wife of Commodus. Augusta, 177-182/3 CE.
Orichalcum Sestertius (31 mm, 21.12 gm). Rome mint, 177-182 CE.
Obv: CRISPINA AVGVSTA, Bare-headed & draped bust r.
Rev: SALVS SC, Salus seated l., feeding out of patera snake coiled round altar, l. arm on side of chair.
RIC-672a, BMC-420, Cohen-33, Sear-6010.

Salus was an old Roman goddess often identified with Hygieia, a daughter of Aesculapius. While the name SALVS appears on many Roman coins, it is often not in a true medical context, but rather in a political sense that peace and safety prevailed in the Empire. She usually holds a scepter and is shown feeding a snake from a patera.