1. pregnant. 2. people with impaired lung function who do not allow them to rinse. 3. patients with antiviral treatment for covid-19. 4. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. 5. any cause of immunosuppression (primary or secondary), including hiv. 6. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac \>7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year

1. pregnant. 2. people with impaired lung function who do not allow them to rinse. 3. patients with antiviral treatment for covid-19. 4. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. 5. any cause of immunosuppression (primary or secondary), including hiv. 6. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac \>7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year

pregnant. people with impaired lung function who do not allow them to rinse. patients with antiviral treatment for covid-19. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. any cause of immunosuppression (primary or secondary), including hiv. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac >7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year

pregnant. people with impaired lung function who do not allow them to rinse. patients with antiviral treatment for covid-19. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. any cause of immunosuppression (primary or secondary), including hiv. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac >7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year

1. pregnant. 2. people with impaired lung function who do not allow them to rinse. 3. patients with antiviral treatment for covid-19. 4. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. 5. any cause of immunosuppression (primary or secondary), including hiv. 6. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac >7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year

1. pregnant. 2. people with impaired lung function who do not allow them to rinse. 3. patients with antiviral treatment for covid-19. 4. patients with diseases that affect saliva, sjogren's syndrome, and systemic lupus erythematosus. 5. any cause of immunosuppression (primary or secondary), including hiv. 6. chronic kidney disease 3b or older, coronary heart disease, uncontrolled diabetes (hb1ac >7), uncontrolled high blood pressure, uncontrolled thyroid disease, history of cancer less than 1 year