Strep throat is highly contagious. If you are around someone who is in the contagious period, you could contract strep throat by being within range of coughs or sneezes. You could also acquire strep throat from a contaminated surface if you do not wash your hands thoroughly before touching your face. In general, it is best to avoid close contact with someone who has strep throat unless they have been fever-free for 24 hours or have been on an antibiotic for strep throat for at least a full day.