0Hi,02br 02br 01font 00epidemic02font 00 a widespread occurence of a disease, or occasionally of some other undesirable thing eg 01i 00an epidemic of bad grammar02i 02br 02br 01font 00pandemic02font 00 The prefix 'pan' refers to 'all' (from Greek). A pandemic is a big epidemic, typically involving the entire world or perhaps a whole country. Unlike 'epidemic', 'pandemic' is only used to refer to diseases.
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