Fluvirin

Influenza vaccines, also known as flu jabs or flu shots, are vaccines that protect against infection by influenza viruses.[3] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes.[3] While their effectiveness varies from year to year, most provide modest to high protection against influenza.[3][4] The United States Centers for Disease Control and Prevention (CDC) estimates that vaccinati... [wikipedia]