Unlike other allergic reactions, however, anaphylaxis can kill. Reaction may begin within minutes or even seconds of exposure, and rapidly progress to cause airway constriction, skin and intestinal irritation, and altered heart rhythms. In severe cases, it can result in complete airway obstruction, shock, and death.
The 2016 Oakland, California, population is 419,267. There are 7,501 people per square mile (population density).
It is the third-largest city in the San Francisco Bay Area, and the eight largest city in California. Oakland has a population estimated at 405,000 in 2014, which ranks 47th in the United States.