Microbiology is the branch of biology which deals with the smallest organisms in the world, such as bacteria, yeasts, algae, and protozoa. These organisms rank among the most helpful and the most harmful to human life and the environment. Microbiologists work to swing the balance in our favor. Microbiologists perform extensive medical research, investigating pathogenic (disease-causing) microorganisms. If you dream of finding the cure for cancer, AIDS, or the common cold, this could be the major for you. Microbiologists also help protect crops and purify our drinking water. An added bonus: through their work with bacteria and yeasts, Microbiology majors can learn how to make their own beer, cheese, yogurt, wine, bread, and pickles. Many microbiologists are, in fact, employed by food and beverage producers to make these very products. Upon graduation, you could even open your own microbrewery.
Science! Take all the biology and chemistry you can. Advanced mathematics is also recommended.