This volunteer smallpox eradication team vaccinator was in the process of vaccinating to a girl who at the time, was living with her family in a baste, which was an illegal settlement. The baste was a place where no governmental facilities were present, and where poverty ran rampant. In this image, the bifurcated needle is clearly depicted, as the vaccinator pricks the skin of the vaccinee with the needle after it had been tipped with live vaccinia virus. If the vaccination is successful, a red and itchy bump develops at the vaccine site in three or four days. In the first week, the bump becomes a large blister, fills with pus, and begins to drain. During the second week, the blister begins to dry up and a scab forms. The scab falls off in the third week, leaving a small scar. People who are being vaccinated for the first time have a stronger reaction than those who are being revaccinated.
CDC/ World Health Organization; Stanley O. Foster M.D., M.P.H.
December 4, 2012
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