Abstract: The present invention relates to a method for preventing transmission of influenza, wherein said method comprises administering an effective amount of a compound to a patient having an influenza virus infection, herein referred to as “index patient”, wherein the compound has one of the formulae (I) and (II), or its pharmaceutically acceptable salt. The compound to be used in the present invention reduces infectivity of the influenza virus of the index patient, and therefore, reduces the risk of the index patient to trigger an influenza epidemic or an influenza pandemic as compared to a control patient.

Abstract: A method for treating influenza is described. The disclosed method generally involves administering an effective amount of a compound, for example baloxavir marboxil, to a subject having influenza, where the compound is administered initially at least about 48 hours after an onset of influenza. Generally, the effective amount is sufficient to alleviate a symptom of influenza in the subject as compared to a symptom that the subject has when the compound is first administered to the subject.

Abstract: The present invention relates to a method for preventing transmission of influenza, wherein said method comprises administering an effective amount of a compound to a patient having an influenza virus infection, herein referred to as “index patient”, wherein the compound has one of the formulae (I) and (II), or its pharmaceutically acceptable salt. The compound to be used in the present invention reduces infectivity of the influenza virus of the index patient, and therefore, reduces the risk of the index patient to trigger an influenza epidemic or an influenza pandemic as compared to a control patient.

Abstract: The present invention relates to a method for preventing transmission of influenza, wherein said method comprises administering an effective amount of a compound to a patient having an influenza virus infection, herein referred to as “index patient”, wherein the compound has one of the formulae (I) and (II), or its pharmaceutically acceptable salt. The compound to be used in the present invention reduces infectivity of the influenza virus of the index patient, and therefore, reduces the risk of the index patient to trigger an influenza epidemic or an influenza pandemic as compared to a control patient.

Abstract: A method for treating influenza is described. The disclosed method generally involves administering an effective amount of a compound, for example baloxavir marboxil, to a subject having influenza, where the compound is administered initially at least about 48 hours after an onset of influenza. Generally, the effective amount is sufficient to alleviate a symptom of influenza in the subject as compared to a symptom that the subject has when the compound is first administered to the subject.

Abstract: A medicament characterized in that (A) a compound represented by the formula (I): its pharmaceutically acceptable salt, or a solvate thereof, wherein P is hydrogen or a group to form a prodrug; A1 is CR1AR1B, S or O; A2 is CR2AR2B, S or O; A3 is CR3AR3B, S or O; A4 is each independently CR4AR4B, S or O; the number of hetero atoms among atoms constituting the ring which consists of A1, A2, A3, A4, nitrogen atom adjacent to A1 and carbon atom adjacent to A4 is 1 or 2; R1A and R1B are each independently hydrogen, halogen, alkyl or the like; R2A and R2B are each independently hydrogen, halogen, alkyl, or the like; R3A and R3B are each independently hydrogen, halogen, alkyl, or the like; R4A are each independently hydrogen, halogen, alkyl, or the like; R4B are each independently hydrogen, halogen, alkyl, or the like; R3A and R3B may be taken together with an adjacent carbon atom to form non-aromatic carbocycle or non-aromatic heterocycle; n is any integer of 1 to 2; and R1 is or the like, is combined

Abstract: The present invention relates to a method for preventing transmission of influenza, wherein said method comprises administering an effective amount of a compound to a patient having an influenza virus infection, herein referred to as “index patient”, wherein the compound has one of the formulae (I) and (II), or its pharmaceutically acceptable salt. The compound to be used in the present invention reduces infectivity of the influenza virus of the index patient, and therefore, reduces the risk of the index patient to trigger an influenza epidemic or an influenza pandemic as compared to a control patient.

Abstract: A medicament characterized in that (A) a compound represented by the formula (I): its pharmaceutically acceptable salt, or a solvate thereof, wherein P is hydrogen or a group to form a prodrug; A1 is CR1AR1B, S or O; A2 is CR2AR2B, S or O; A3 is CR3AR3B, S or O; A4 is each independently CR4AR4B, S or O; the number of hetero atoms among atoms constituting the ring which consists of A1, A2, A3, A4, nitrogen atom adjacent to A1 and carbon atom adjacent to A4 is 1 or 2; R1A and R1B are each independently hydrogen, halogen, alkyl or the like; R2A and R2B are each independently hydrogen, halogen, alkyl, or the like; R3A and R3B are each independently hydrogen, halogen, alkyl, or the like; R4A are each independently hydrogen, halogen, alkyl, or the like; R4B are each independently hydrogen, halogen, alkyl, or the like; R3A and R3B may be taken together with an adjacent carbon atom to form non-aromatic carbocycle or non-aromatic heterocycle; n is any integer of 1 to 2; and R1 is or the like,