Getting it in a way that you can re-infuse it in somebody else or getting out the proteins, the Gama globulin, the antibodies from that serum and using it as a way of both treatment and possibly prophylaxis but mostly treatment.
Finally, children with sickle cell typically get prophylaxis with penicillin and an additional polysaccharide vaccine against Streptococcus pneumoniae to help prevent sepsis and meningitis with encapsulated bacteria.
To do something like needle and syringe exchange programs or pre-exposure prophylaxis which is a pill usually used to treat HIV that can prevent HIV. That's what's needed to really break the back of the epidemic.
We know that many gay men actively seek sexual health services, for example, many of them will take HIV medications as pre-exposure prophylaxis to prevent HIV infection.