ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Vaccine. Doctor preparing a measles vaccine. He is using a hypodermic syringe to dissolve the powdered vaccine (vial, upper centre) with a solvent. Vaccination against measles in childhood can provide long-term protection. The injection of components of the virus particle causes the response of the immune system to be stronger when measles infections occur in the future.
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