There is____that shows that the disease is spread through the air., proof, A______of fresh water is essential to avoid disease., supply, Many people______malaria with long periods of rainfall., associate, ______air can cause a number of health problems., Polluted, Antibiotics are the most_____treatment for the illness., effective, Over 10,000 people were_____by the disease., infected, Heart disease is a_______cause of death worldwide., major, Scientists are trying to______data together to test their theory., gather.

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