what is vaccine? who invent vaccine?
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Edward Jenner is considered the founder of vaccinology in the West in 1796, after he inoculated a 13 year-old-boy with vaccinia virus (cowpox), and demonstrated immunity to smallpox. In 1798, the first smallpox vaccine was developed.
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ɪᴛ ᴡᴀs ᴀʟsᴏ ᴛʜᴇ ғɪʀsᴛ ᴅɪsᴇᴀsᴇ ғᴏʀ ᴡʜɪᴄʜ ᴀ ᴠᴀᴄᴄɪɴᴇ ᴡᴀs ᴘʀᴏᴅᴜᴄᴇᴅ. ᴀʟᴛʜᴏᴜɢʜ ᴀᴛ ʟᴇᴀsᴛ sɪx ᴘᴇᴏᴘʟᴇ ʜᴀᴅ ᴜsᴇᴅ ᴛʜᴇ sᴀᴍᴇ ᴘʀɪɴᴄɪᴘʟᴇs ʏᴇᴀʀs ᴇᴀʀʟɪᴇʀ, ᴛʜᴇ sᴍᴀʟʟᴘᴏx ᴠᴀᴄᴄɪɴᴇ ᴡᴀs ɪɴᴠᴇɴᴛᴇᴅ ɪɴ ʙʏ ᴇɴɢʟɪsʜ ᴘʜʏsɪᴄɪᴀɴ ᴇᴅᴡᴀʀᴅ ᴊᴇɴɴᴇʀ.
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