I define security based in biology fundamentals:- Unicellular robbers and murderers; multicellular robbers and murderers. Let me elaborate, coronavirus is unicellular [single cell] microorganism which robs genetic material from human to propagates and in process can kill, while, a thief is multicellular [multiple cells] organism, who steal and times kill in the process. So, we are insecure from both.
In that matter, national security is operated within two formations; internal security and external security headed in technical terms by Inspector General [IG] of police, and Chief of Defence Forces [KDF] respectively. The police keep law and order by apprehending and arresting criminals, while KDF prevent country from external aggression.
Likewise, body’s security is handled by white blood cells classified into two groups; phagocytes and immunocytes. Phagocytes engulf and digest foreign materials in the body through the process phagocytes,just like armed forces. Immunocytes produce antibodies which are proteins that bind to and destroy foreign materials. Some antibodies called agglutinins cause invading microorganisms to clump together, a process called agglutination just police do by arresting and prosecuting criminals.
However, some crimes like cyber crimes and terrorism needs some sophisticated technology like forensic lab to crack. Likewise, body immunity can be supplemented by what is termed as artificial active immunity: Where antibodies are formed in response to the artificial administration of dead or attenuated pathogens in case of covid jab; America’s Johnson & Johnson Janssen vaccine and China’s Sinopham or genetically engineered like United Kingdom’s Oxford/AstraZeneca, and America’s Moderna to mention but a few.
So, for non-medics, vaccines are supplementing and boosting your immunity ‘soldiers’ to fight coronavirus among other immunizable diseases.