There is often an instinctive reaction among many ordinary people that fears about the side effects of hastily developed vaccines are merely hysteria generated by conspiracy theories which have spread across the internet. It is instructive to study the vaccine used to combat the H1N1 variety of flu, more commonly known as swine flu.
https://web.archive.org/web/20120302093232/http://www.who.int/vaccine_safety/topics/influenza/pandemic/h1n1_safety_assessing/narcolepsy_statement/en/index.html
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