Fill in the Blanks Human healthOnline version Fill in the blanks by Kasthuri Subramaniam 1 VECTORS discomfort diseases infected CONTACT sanitation host disease abnormal stress pathogens water 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 .