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...