ISSN: 2574-7797
Authors: Mahmood MM*
The sheer importance of the herd’s immunity in protecting societies from the burden of contagious diseases and in providing opportunities for survival and continuity has not hidden after those societies were threatened, even with the disappearance sometimes by some infectious factors. Herd immunity can be achieved either through vaccination of large sectors of society, or it may sometimes be achieved by infection of a large proportion of society members naturally and acquiring natural immunity after recovery, or by both ways.
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