A composition comprising at least two influenza A virus-neutralizing binding molecules that bind to an epitope in a stem region of influenza A virus hemagglutinin protein, the composition comprising: i) a first binding molecule capable of neutralizing at least one influenza A virus subtype selected from the group consisting of H1, H2, H5 and H9; and ii) a second binding molecule capable of neutralizing at least one influenza A virus subtype selected from the group consisting of H1, H3, H5, H7 and H9; wherein the first binding molecule comprises a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 7, a CDR2 region of SEQ ID NO: 8 and a CDR3 region of SEQ ID NO: 9, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 10, a CDR2 region of SEQ ID NO: 11 and a CDR3 region of SEQ ID NO: 12; and wherein the second binding molecule comprises any one polypeptide selected from the group consisting of i) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 19, a CDR2 region of SEQ ID NO: 20 and a CDR3 region of SEQ ID NO: 21, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 22, a CDR2 region of SEQ ID NO: 23 and a CDR3 region of SEQ ID NO: 24; ii) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 25, a CDR2 region of SEQ ID NO: 26 and a CDR3 region of SEQ ID NO: 27, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 28, a CDR2 region of SEQ ID NO: 29 and a CDR3 region of SEQ ID NO: 30; iii) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 31, a CDR2 region of SEQ ID NO: 32 and a CDR3 region of SEQ ID NO: 33, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 34, a CDR2 region of SEQ ID NO: 35 and a CDR3 region of SEQ ID NO: 36;and iv) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 37, a CDR2 region of SEQ ID NO: 38 and a CDR3 region of SEQ ID NO: 39, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 40, a CDR2 region of SEQ ID NO: 41 and a CDR3 region of SEQ ID NO: 42. i) a first binding molecule capable of neutralizing at least one influenza A virus subtype selected from the group consisting of H1, H2, H5 and H9; and ii) a second binding molecule capable of neutralizing at least one influenza A virus subtype selected from the group consisting of H1, H3, H5, H7 and H9; i) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 19, a CDR2 region of SEQ ID NO: 20 and a CDR3 region of SEQ ID NO: 21, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 22, a CDR2 region of SEQ ID NO: 23 and a CDR3 region of SEQ ID NO: 24; ii) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 25, a CDR2 region of SEQ ID NO: 26 and a CDR3 region of SEQ ID NO: 27, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 28, a CDR2 region of SEQ ID NO: 29 and a CDR3 region of SEQ ID NO: 30; iii) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 31, a CDR2 region of SEQ ID NO: 32 and a CDR3 region of SEQ ID NO: 33, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 34, a CDR2 region of SEQ ID NO: 35 and a CDR3 region of SEQ ID NO: 36;and iv) a polypeptide comprising a light-chain variable region comprising, as determined according to the Kabat method, a CDR1 region of SEQ ID NO: 37, a CDR2 region of SEQ ID NO: 38 and a CDR3 region of SEQ ID NO: 39, and a heavy-chain variable region comprising, as according to the Kabat method, a CDR1 region of SEQ ID NO: 40, a CDR2 region of SEQ ID NO: 41 and a CDR3 region of SEQ ID NO: 42.