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...