It modulates the response to the virus at the level of the immune system, and is used to treat an infection.

We conducted an experimental protocol with a nasal recombinant IFNα-2b formulation (Nasalferon) in 12 healthy volunteers who received 1 MIU per nostril twice a day, three consecutive days, and studied the induction of biomarkers related to antiviral and immune responses. Nasalferon increases the antiviral biomarker OAS1 transcript levels in oropharynx and PBMCs, regulates molecular and cellular elements related to innate and adaptive immune responses and decreases granulocytes population. These effects support Nasalferon use in virally-exposed populations.

Nasalferon, a new nasal formulation of IFNα2b, modulates cellular and molecular elements associated with an antiviral response in mucosa and blood

Cuba will start applying Nasalferon to travelers and live-in family members

In Cuba, All International Travelers to Receive Nasalferon

An Experience with Cuban Biotech's Nasalferon to Prevent SARS-COV-2 Infections in International Travelers and their Contacts

Meanwhile "free" countries are destroying the lives of millions of people by pretending covid doesn't exist anymore, and paxlovid is $1000 dollars and doctors don't want to prescribe it because covid is "mild".