Controlled infection “A live HIV vaccine that can’t infect the people it’s supposed to protect may be possible after all. A team based in

California has created a hybrid of HIV and another virus that can enter cells, but can’t replicate once it’s there. ” Not really a vaccine as much as immunotherapy for those already HIV-infected; introduced to the patient through an arduous process, to prime the patient’s cell-mediated immune response. [New Scientist]