Where is $MALT$ (Mucosa-Associated Lymphoid Tissue) located?

Arrange the steps of the $phagocytosis$ process in the correct sequence.
$(a)$ Ingestion of microbes by phagocytes
$(b)$ Dilation of blood vessels by histamine
$(c)$ Formation of $phagosome$ and $phagolysosome$
$(d)$ Migration of phagocytes into $E.C.F.$
$(e)$ Attraction of phagocytes by $chemotoxins$ secreted by microbes
$(f)$ Intracellular destruction of bacteria

In an autoimmune disease,.........

What is introduced into the body during vaccination?

Immunoglobulins are made up of

$IFN$ (Interferons) are . . . . . . ?