Define interferon.

1. Interferon: Interferon is defined as the antiviral protein which is released when a virus or viral particles enter the body. It helps fight against the virus that has entered the body.
2. Depending on the type of viral proteins identified by it, interferons are of two types:

• Type 1 Interferon (IFN type-1)
• Type 2 Interferon (IFN type-2)