- under 18 years of age - negative for sars-cov-2 infection - severe symptoms of infection - symptoms involving the entire respiratory system, including pneumonia - requires hospitalisation prior to study start - asymptomatic - pregnant or actively trying to conceive a child - other comorbidities that would prevent administration of the device - requirement to take regular medications administered by inhalation, or via the naso- and oropharyngeal route - patients with known allergies to neem or hypericum oil - patients with asthma

- under 18 years of age - negative for sars-cov-2 infection - severe symptoms of infection - symptoms involving the entire respiratory system, including pneumonia - requires hospitalisation prior to study start - asymptomatic - pregnant or actively trying to conceive a child - other comorbidities that would prevent administration of the device - requirement to take regular medications administered by inhalation, or via the naso- and oropharyngeal route - patients with known allergies to neem or hypericum oil - patients with asthma