Coryza and Catarrh are the same i.e. mucus from usually nasal passages but in homeopathy it can include the digestive system and is really to do with over production (Sycotic miasm).
A cold is a runny nose and sneezing whereby you carry on regardless whereas influenza is more serious and often has aches in muscles, bones with a temperature is far more serious, usually requiring bed rest and more long lasting than a common cold. You don't die of a common cold whereas you could if your suscepibility is particularly low.

I hope that answers you question.

[ 13. April 2003, 01:26: Message edited by: Ricky ]

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RSHom - Registered Homeopath