A strain can be constituted-of-or-filled-with some (immunodeficiency virus).
Persons may be infected by a human (immunodeficiency virus).
Some percent can be constituted-of-or-filled-with human (immunodeficiency virus).
An incidence can be constituted-of-or-filled-with human (immunodeficiency virus).
Some persons may be infected by a human (immunodeficiency virus).