When is Interferon used? I. Viral Diseases II. Bug Bite deterrent III. Venial Diseases IV. Balance problems known as Vertical Problems

Viral diseases

Explanation:

Interferon is a prescription medication that is used to treat viral diseases. It contains a group of signaling proteins produced and released by host cells in response to the presence of several viruses. Interferons help the body immune system fight viral diseases. It is produced in the body by white blood cells. For example; a virus infected cell will release interferons to help heighten it antiviral defenses when confronted by viral diseases such as Hepatitis B.

the correct answer is 4 (giveaways to the public)

something that is given away or gave out for free. an occasion at which things are given away to free. something that is evident or obvious; something that uncovers a mystery.

it could be be in a form of a lucky draw as well. these the company events gather more audience for their pr and it also increases their ratings as well. this is a way to attract more customers towards themselves.