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...