Vhich of these situations would NOT be considered an environmental health issue? A cluster of HIV cases traced to a single infected intravenous drug user. Increased incidence of heat stroke from one decade to the next. The makers of a "smart inhaler" app that tracks asthma medication usage notice that inhalers are used more often the day after air pollution levels increase An outbreak of hantavirus cases that coincides with an increase in rodent populations after a key rodent-predator is locally extirpated. .