Co-trimoxazole prophylaxis against PCP is effective, but there are no data on when to initiate it in infants of indeterminate 17-AAG mw HIV status being followed up after in utero exposure to HIV. A maternal VL of 1000 HIV RNA copies/mL is an arbitrary cut-off to define infants at higher risk of transmission, in whom it is recommended to start prophylaxis until lack of transmission has been established.

8.3.1 Infants born to HIV-positive mothers should follow the routine national primary immunization schedule. Grading: 1D Generally, BCG vaccine should only be given when the exclusively formula-fed infant is confirmed HIV uninfected at 12–14 weeks. However, infants considered at low risk of HIV transmission (maternal VL <50 HIV RNA copies/mL at or after 36 weeks' gestation) but with a high risk of tuberculosis exposure may be given BCG at birth. Where the mother is coinfected with HBV, immunization against HBV infection should be as per the Green Book and does not differ

Z-VAD-FMK price from management of the HIV-unexposed infant [49]. With sensitivity to concerns about confidentiality, families should be strongly encouraged to inform primary health carers, including midwives, health visitors and family doctors about maternal HIV and indeterminate infants. This will enable the local team to give appropriate support and advice, especially regarding infant feeding and where the infant or mother is unwell. 8.4.1 All mothers known to be HIV positive, regardless of ART, and infant PEP, should be advised to exclusively formula feed from birth. Grading: 1A It is well established that HIV can be transmitted from mother to child by breastfeeding [[50][[51][#[52]]Ent]288]. RCT evidence from Kenya puts the transmission rate at 16% over 2 years, accounting for almost half the total MTCTs [52]. Complete avoidance of breastfeeding removes this risk altogether [[52][[53][#[54]]Ent]290] and is the current standard of care in the UK [[3],[55]]. This is in line with previous World Health Organization (WHO) guidance, that exclusive feeding with infant formula milk should be recommended for women with HIV where it is affordable, feasible, acceptable,

sustainable and safe [56]. Recently, cohort [[57][[58][#[59]][60]]296] and RCT [[5],[8],[61]] data from Africa have shown that ART can significantly reduce the risk of HIV transmission from breastfeeding. This is in settings where breastfeeding Thalidomide is not affordable, feasible, acceptable, sustainable and safe, and mortality from formula feeding outweighs additional mortality from HIV transmission by breastfeeding [[62],[63]]. WHO guidance remains that in countries where formula feeding is safe, a national or regional policy decision should be made on feeding policy [64]. Although breastfeeding transmission is reduced by ART, it is not abolished [[8],[57],[59][[60][#[61]][65]][66],301,302]. There is laboratory evidence that the breast milk of HIV-positive women on ART contains cells that may shed virus [67].