Africanized honey bees, commonly known as killer bees, have become a growing problem since first appearing in the United States in the 1990s. They are much more aggressive than normal bees, and their stingers contain poison that can kill people and other animals. There are very few guaranteed methods of repelling killer bees, but there are some protective steps you can take.
A Texas conservationist named Will Baird developed a formula to kill and repel killer bees, and his "BeeAlert" spray began selling around 2005. The spray formula is specially treated to bypass the bees' water-repellant hairs so the water in the formula can drown them. The formula is nontoxic and can be applied directly to any human attacked by bees. What's more, you only need to kill a few bees before the rest take the hint and avoid the area.
Insecticide sprays can vary on whether they will fight back Africanized bees; some people suspect that certain insecticides can attract them. Insecticides that contain DEET oil can be effective; this is one of the most common elements, so lots of insecticides will contain it. Applying this spray into the air is the only way for it to work against these bees; applying it to your skin like regular repellant will not.
Basic protection clothing for normal bees -- the type traditionally used by beekeepers -- can also work against Africanized bees. Lightweight plastic veils will protect your head; make sure you have one that can shield your complete face and neck. Long-sleeved clothing and gloves will protect the rest of your body.
You can also take certain steps to not draw the bees’ attention. Avoid wearing perfume/cologne or deodorant -- anything with a distinctive smell that will attract them. Lemon is one smell that will especially annoy these bees. If you are traveling at night or in a dark area, use lamps with red filters; bees cannot see the color red.