inclusion criteria: 1. adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. 2. covid-19-positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs 3. asymptomatic or within seven days of the onset of symptoms. 4. has the ability to rinse and expectorate.

inclusion criteria: 1. adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. 2. covid-19-positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs 3. asymptomatic or within seven days of the onset of symptoms. 4. has the ability to rinse and expectorate.

inclusion criteria: adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. covid-19 positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs asymptomatic or within seven days of the onset of symptoms. has the ability to rinse and expectorate.

inclusion criteria: adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. covid-19 positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs asymptomatic or within seven days of the onset of symptoms. has the ability to rinse and expectorate.

inclusion criteria: 1. adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. 2. covid-19 positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs 3. asymptomatic or within seven days of the onset of symptoms. 4. has the ability to rinse and expectorate.

inclusion criteria: 1. adults age 18 years or older presented to tetamman clinics, jeddah, saudi arabia. 2. covid-19 positive patients confirmed by rt-pcr and within two days of oral or nasopharyngeal swabs 3. asymptomatic or within seven days of the onset of symptoms. 4. has the ability to rinse and expectorate.