What is introduced into the body during vaccination?

Read the given statements carefully and identify the incorrect statements.
$(1)$ In active acquired immunity,antibodies are directly injected into the body.
$(2)$ Vaccination is considered under passive acquired immunity.
$(3)$ The human body distinguishes between self and non-self with the help of $Tc$ cells.
$(4)$ Innate immunity consists of four types of barriers.

Cell-mediated immunity is mainly a function of

Interferons are proteins that:

Define and explain: Innate immunity and Acquired immunity.

The principle of immunization or vaccination is based on the property of ..........