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DavidB4-bot

→‎top: HTTP --> HTTPS #3, replaced: http://www.cdc.gov → https://www.cdc.gov

DavidB4-bot

→‎References: Spelling, grammar, and general fixes

RCJackson

no edit summary

Brossa

Attribution for a direct quote. Plagiarism is morally wrong.

Aschlafly

Reverted edits by Secks (Talk); changed back to last version by Jennisuk

Secks

Replacing page with '-------------'

Jennisuk

no edit summary

HenryS

Reverted edits by SoccerGirl (Talk); changed back to last version by Fox

SoccerGirl

update

Fox

Reverted edits by Flipper (Talk); changed back to last version by Brian

Flipper

various grammatical changes

Brian

Added source information for text

HenryS

no edit summary

Aschlafly

New page: Active immunity is the production of antibodies against a specific disease by the immune system. Active immunity can be acquired in two ways, either by contracting the disease or through v...