there was  a  crowdsourced  vaccine,  
  that could be created  regionally by  
    most   pharmaceutical  companies    
   without  much  effort, and  it was   
   estimated   that   it  had   saved   
       tens      of      millions.      
                                        
 but it was not  officially recognized by 
 the  world health organization,  and  as 
 such did  not give what  the  sanctioned 
 (and   unobtainable)   ones   did:   the 
 subskin  chip that would  let you  enter 
       (or      leave)     cities.      
                                        
  and that's why, eventually, we would  
   create our  own  chips.  they were   
  larger than the official ones, and a  
    little  unstable,   and   needed    
   maintenance.  but  they   worked!    
  or,  they would work together with a  
  little something to  make the guard   
     look     the     other    way.     
                                      
                                      
                                          
   but the scanner showed green, so...