Inclusion Criteria:  Subject is male or female aged ≥45 and <80 years Subject is tested to confirm infection with SARS-CoV-2 on a sample taken within 3 days before randomization Subject is either without symptoms or has 1 or more of the following symptoms: Stuffy or runny nose, Sore throat, Loss of taste, Loss of smell, Headache.  None of the symptoms should have been present >5 days.  Exclusion Criteria:  Subject has an underlying condition that may interfere with intranasal administration of the IMP (e.g., chronic ulcers in the nose). Subject has symptoms suggesting engagement of the lower respiratory tract or a systemic engagement Subject has an active or acute infection other than SARS-CoV-2 Subject has another member of the same household recruited to this study