Sepsis but I'm relay not sure I joust saw it in my head
        
             
        
        
        
Viruses enter human body like an invader and uses the living cells to replicate causing infections in the cell or can damage it.
Explanation:
The attacks of viruses on the body of living organisms is compared with a ‘sneak attack’ as they invade the body and enters into a living cell to replicate themselves. This may cause damage or bring about changes in the cell causing sickness and infections. 
They can hide themselves on our body attacking sneakily to harm the immune system to fight the infection. This stealth infection can result in fever, damaging immunity, disorder etc.
 
        
             
        
        
        
One characteristic of living things is that they grow and develop.
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All living things go through different stages of life and develop.
I hope this helps!</span>