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             ___     _    _     ______            
    ___     / _ \\  | |  | ||  /_   _//   ____    
   /   ||  / //\ \\ | |/\| ||   -| ||-   |    \\  
  | [] || |  ___  |||  /\  ||   _| ||_   | [] ||  
   \__ || |_||  |_|||_// \_||  /_____//  |  __//  
    -|_|| `-`   `-` `-`   `-`  `-----`   |_|`-`   
     `-`                                 `-`

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Text this: Persistence of measles, mumps, and rubella protective antibodies 3 years after revaccination in HIV-infected children receiving antiretroviral therapy