Two of 199 men without HIV infection who received the active prophylaxis
contracted HIV during a median of 9.
Passive active prophylaxis
against hepatitis B in children with acute lymphoblastic leukemia.
The authors combined the results of all studies that compared active prophylaxis
with control so that they could analyze prophylaxis vs no prophylaxis.
If active prophylaxis
is considered due to perceived further risk, a single dose of LMWH prior to departure or fitted below-knee graded compression stockings may be used.
Therefore, active prophylaxis
cannot be generally recommended, and the need for it must be determined on a case-by-case basis.