TABLE 1.

Risk of transmission in the absence of treatment or postexposure prophylaxis

Event	HIV	HCV (reference)
High-risk sexual exposure	0.5%–3%	Rare; 3% if coinfected (2)
Percutaneous exposure (small amounts)	0.3%	1.8% (3)
Vertical transmission	20%–30%	2% to 5%; up to 36% if coinfected (9,12,16)

HCV Hepatitis C virus