CHRIS PRIEST & MARK CLARKE / SCIENCE PHOTO LIBRARY CHRIS PRIEST & MARK CLARKE / SCIENCE PHOTO LIBRARY
Infant girl (aged three months) being given an oral dose of live attenuated poliomyelitis vaccine. The doctor is using a special spoon which helps the baby in swallowing the small amount of pink liquid. Live polio vaccine (Sabin attenuated strain) contains antigens to all three types of poliovirus amp;& is generally given in three doses at intervals of not less than one month. The vaccine virus provokes production of IgM, IgA and IgG serum antibodies & also secretory IgA in the gut. The Sabin polio vaccine is believed to be among the safest vaccines in current use.
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