1. inability to tolerate insertion of the light illuminator due to oronasal size, shape, or anatomical variants 2. known allergic reactions to components of the nasal decolonization treatment including methylene blue or chlorhexidine gluconate. 3. covid-19 illness that is moderate or severe in nature.

1. inability to tolerate insertion of the light illuminator due to oronasal size, shape, or anatomical variants 2. known allergic reactions to components of the nasal decolonization treatment including methylene blue or chlorhexidine gluconate. 3. covid-19 illness that is moderate or severe in nature.

inability to tolerate insertion of the light illuminator due to oronasal size, shape, or anatomical variants known allergic reactions to components of the nasal decolonization treatment including methylene blue or chlorhexidine gluconate. covid-19 illness that is moderate or severe in nature.

inability to tolerate insertion of the light illuminator due to oronasal size, shape, or anatomical variants known allergic reactions to components of the nasal decolonization treatment including methylene blue or chlorhexidine gluconate. covid-19 illness that is moderate or severe in nature.