The health board said the best course of action was to stay at home, take paracetamol to relieve symptoms of any fever and to drink plenty of water to prevent dehydration.
Death seems ever-present in the slum, where a fever or disease easily caught from unclean water in the rainy season can claim a life without much warning.
They are frequent victims of diseases such as dengue fever, spread by mosquitoes that breed in the landfill's stagnant water, as well as respiratory ailments and infections attributable to rats, birds and other vermin.