The original vaccine, as most people are aware, was produced by Jenner in 1798. He noted that milkmaids, who handled beasts with cowpox, were immune to smallpox. He used the fluid from the cowpox vesicles to infect the skin of other humans and so produced immunity to smallpox. The two viruses are very similar in… Continue reading Immunization through vaccines: Manipal Nurse Sunday Column
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