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Officials have reiterated medical advice after a hiker nearly died of an allergic reaction to snake venom when he sucked at a bite on his hand.

The 30-year-old was bitten by a viper that he had accidentally disturbed in Cormet de Roselend, in the Savoie department.

He sucked at the wound - contrary to medical advice in such circumstances - and went into anaphylactic shock. The rapid arrival by helicopter of an experienced medical team saved his life.

While viper bites are relatively rare in France, medical advice in case of attacks are to call for help; put ice - if possible - at the site of the wound to slow the spread of venom, sit down and remain calm. Do not suck at the wound.

Read more: Snakes on the plains - and what to do if you get bitten