helpline – n. a telephone service that offers help or information

dengue fever – n. a viral disease of the tropics, transmitted by mosquitoes and causing sudden fever and pain in the joints.

mosquito – n. a small flying insect that bites the skin of people and animals and sucks their blood

headache – n. an ache or pain in the head

forecast – v. to say that something will happen in the future

trace – v. to follow something back to its cause
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