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Group A Streptococcus (group A strep, GAS) bacteria can live in a person's nose and throat. The bacteria are spread through contact with droplets from an infected person's cough or sneeze. If you touch your mouth, nose, or eyes after touching something that has these droplets on it, you may become ill. If you drink from the same glass or eat from the same plate as the sick person, you could also become ill. It is also possible for group A strep bacteria to spread from contact with sores from a group A strep skin infection.