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...