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...