Answer:
The safety and effectiveness of vaccines are under constant study. Because vaccines are designed to be given routinely during well-child care visits, they must be extraordinarily safe. Safety testing begins as soon as a new vaccine is contemplated, continues until it is licensed, and is monitored indefinitely after licensure. 
Explanation:
 
        
                    
             
        
        
        
Protons electrons and newtrons
<span>The protons and neutrons are located in the nucleus of the atom</span>
        
                    
             
        
        
        
the body has levels of organisms that built on each other cells make up tissues, tissues make up organs, and organs make up organs system the function of an organs system
depends on the the integrated activity of it organs for instance digestive system organs corporate to process food
 
        
             
        
        
        
Answer:
I think a fish
Explanation:
I'm pretty sure the earthworm would get buried or it's bones would just disentergrate. i cannot spell.