Answer:
I think It might be deletion mutation 
 
        
             
        
        
        
Lack of O2, hunger, hypothermia... Everything can be a problem when in Everest
        
             
        
        
        
Answer:
Coronaviruses are named for the crown-like spikes on their surface. There are four main sub-groupings of coronaviruses, known as alpha, beta, gamma, and delta.
Human coronaviruses were first identified in the mid-1960s. The seven coronaviruses that can infect people are:
Common human coronaviruses
229E (alpha coronavirus)
NL63 (alpha coronavirus)
OC43 (beta coronavirus)
HKU1 (beta coronavirus)
Other human