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...