AARON HAUPT / SCIENCE PHOTO LIBRARY AARON HAUPT / SCIENCE PHOTO LIBRARY
Child vaccination. Four year old girl having a vaccine injected into her upper arm. Vaccines that provide protection against many infectious diseases are available to children and babies as part of their recommended immunization schedule. Vaccines consist of dead or weakened doses of disease-causing micro-organisms which are injected into the body to stimulate the immune system. This makes the immune system able to rapidly detect and destroy a particular micro- organism the next time that the person is exposed to it. The doctor is wearing rubber gloves to maintain sterile conditions.
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