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The person vaccinated has largely reduced risk and is at a very small chance of getting infection or symptoms with exposure; not zero risk but a lot smaller now that you are vaccinated. Whereas, the un-vaccinated hairdresser remains at high risk of infection, especially since the occupation is largely indoors. I recommend that you ask your hairdresser to comply with masking while doing your hair, this will reduce the hairdresser’s exhaled breath from reaching you.