The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies ($lgA$) to protect the infant. This type of immunity is called as
Autoimmunity
Passive immunity
Active immunity
Acquired immunity
Name a recombinant vaccine that is currently being used in vaccination program.
"Graveyard of $RBCs$''
Definitions / Explanation : Active immunity & Passive immunity
Discribe the Innate immunity.
Spleen is