The present invention is directed to provide infection inhibitor products for an influenza virus. More specifically an inhibitorysubstance that inhibits the activity of an RR sequence to permit a molecule of which it forms a part to be introduced into cells such as an antibody that recognizes a peptide having an amino acid sequence RERRRKKR (SEQ ID NO.1) is formulated as a pharmaceutical composition and an infection inhibitor products for an influenza virus containing the pharmaceutical composition is manufactured.
