Sphingoid compounds for prophylaxis and/or therapy of coronaviridae infection

A process of treating or preventing infection and/or viral infectious disease by SARS-CoV-2 in a subject comprising

• administering to a subject in need treatment of a viral respiratory infection or at risk of exposure to SARS-CoV-2, a composition comprising:
• a sphingoid compound of formula I:
• where
• R1 means a hydrogen atom, a methyl radical or —CH2ORa, where Ra is a hydrogen atom, an alkyl radical with a substituent of amine, a quaternary ammonium optionally including 3 hydrogens, or a sugar radical,
• R4 and R5 independently of one another mean a hydrogen atom, oxygen atom, a hydroxyl group, a quaternary ammonium, or an amine,
• R6 is an alkyl radical optionally comprising one or more substituents of N, a quaternary ammonium, or
• R2 and R3 independently of one another mean a hydrogen atom or an alkyl radical,
• n means an integer of from 2 to 50, optionally 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or 16, and
• means a double bond or single bond,
• and/or salts thereof and/or hydrates thereof and/or solvates thereof and/or polymorphs thereof and/or optical isomers, optionally enantiomers and/or diastereomers and/or epimers, thereof and/or mixtures thereof.
• thereby treating or preventing a viral infection in the subject.