a high temperature (fever) of 38°C (100.4F) or above
sweats and chills
generally feeling unwell
muscle pains
headaches
cough
diarrhoea
with the fever coming in cycles every few days.
The person also has to have been somewhere where they could have been bitten by a mosquito that carries the malarial parasite, so broadly speaking they would have recently been to one of the following places – South America, Africa, the Indian sub-continent and the Far East.
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