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...