1. the participant is related to any member of the study staff or has a close relationship or conflict of interest with the sponsor. 2. known hypersensitivity or allergy to any component of the test product. 3. contraindication to nasal spray 4. insufficient vaccination: any incomplete vaccination schedule * either a 3rd dose within the last month * or sars-cov-2 infection with less than 2 vaccine doses or with 2 vaccine doses less than 1 month old. 5. any condition, including covid, that is likely to result in hospitalization during study participation. 6. conditions that may result in hospitalization during study participation. 7. known pregnancy or positive urine pregnancy test at d0 by the nurse, or current breastfeeding 8. participation in an antiviral clinical trial or other trial using a medical device for disease prevention covid 19

1. the participant is related to any member of the study staff or has a close relationship or conflict of interest with the sponsor. 2. known hypersensitivity or allergy to any component of the test product. 3. contraindication to nasal spray 4. insufficient vaccination: any incomplete vaccination schedule * either a 3rd dose within the last month * or sars-cov-2 infection with less than 2 vaccine doses or with 2 vaccine doses less than 1 month old. 5. any condition, including covid, that is likely to result in hospitalization during study participation. 6. conditions that may result in hospitalization during study participation. 7. known pregnancy or positive urine pregnancy test at d0 by the nurse, or current breastfeeding 8. participation in an antiviral clinical trial or other trial using a medical device for disease prevention covid 19

the participant is related to any member of the study staff or has a close relationship or conflict of interest with the sponsor. known hypersensitivity or allergy to any component of the test product. contraindication to nasal spray insufficient vaccination: any incomplete vaccination schedule either a 3rd dose within the last month or sars-cov-2 infection with less than 2 vaccine doses or with 2 vaccine doses less than 1 month old. any condition, including covid, that is likely to result in hospitalization during study participation. conditions that may result in hospitalization during study participation. known pregnancy or positive urine pregnancy test at d0 by the nurse, or current breastfeeding participation in an antiviral clinical trial or other trial using a medical device for disease prevention covid 19

the participant is related to any member of the study staff or has a close relationship or conflict of interest with the sponsor. known hypersensitivity or allergy to any component of the test product. contraindication to nasal spray insufficient vaccination: any incomplete vaccination schedule either a 3rd dose within the last month or sars-cov-2 infection with less than 2 vaccine doses or with 2 vaccine doses less than 1 month old. any condition, including covid, that is likely to result in hospitalization during study participation. conditions that may result in hospitalization during study participation. known pregnancy or positive urine pregnancy test at d0 by the nurse, or current breastfeeding participation in an antiviral clinical trial or other trial using a medical device for disease prevention covid 19