White blood cells

Our body has Blood, but why do we have white blood cells? It turns out, that blood has those tiny stuff. How is it used? It is Life‘s bodyguards! Now, there are many types of blood cells, from T cells to B cells and lymphocytes. First are physical barriers, who are the first line like pawns in chess, or the walls of a castle! Skin is one of the few things. Saliva, stomach acid, etc. are all barriers. 
In the body 
Pathogens that come into the body are confronted by white blood cells, who engulf the pathogens. 
Vaccines 
When you get a flu shot, don’t think it sucks, actually it is good for you a tiny amount or inactivated pathogen will be injected into your arm. B cells, aka antibodies, are like spies, who will remember how the body defeated the virus, because every year, many people (including children) will lose the ability to fight influenza or other viruses, minor, or major. 
Tools to help immunity 
If you don’t really want to get a flu shot, then you should: 
* wear a mask in an epidemic 
* sanitize your hands 
* social distance(six feet away) 
Category:Biology
Category:Body