The sting from a killer bee contains less venom than a regular bee sting.
However, they are aggressive, attack in large swarms, and will follow you for up to a mile.
In the 1950’s in South America, an entomologist introduced the African honey bee to Brazil cross-breeding it with the European honey bee. The thought was that it would be a more efficient honey producer. The first escape from hives was in 1957 in San Paulo Brazil, they have moved northward traveling 200 to 300 miles per year.
In 1993, they have been documented in Texas, Arizona, Southern California, and as far east as North Carolina and probably Arkansas. With the reality of global warming, killer bees will slowly progress northward. As of 2002 there have been approximately 382 fatal attacks worldwide by killer bees.