MICHAEL DONNE / SCIENCE PHOTO LIBRARY MICHAEL DONNE / SCIENCE PHOTO LIBRARY
Flu vaccination. Syringe about to be used by a general practice (GP) nurse to inject an influenza (flu) vaccine into a mother's arm as her son watches. Influenza vaccines contain dead influenza viruses. When injected, the vaccine stimulates the body's immune system to produce antibodies that protect against future infection by live influenza viruses. Vaccinations against influenza are usually short-lived because the virus mutates into new forms. Vaccination is mostly recommended for the elderly and the young, or anyone with respiratory or circulatory disease.
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