Fill in the Blanks Human healthOnline version Fill in the blanks by Kasthuri Subramaniam 1 discomfort stress sanitation host disease CONTACT infected diseases pathogens water abnormal VECTORS A is an condition of body or mind that causes , difficulty to function or to an individual . Infectious are spread by . Transmitted from an person ( ) to another person through and mediums such as WATER , AIR , and . Infection through usually happens in areas with inadequate water supply and poor .