In low-income countries, the risk of female-to-male transmission is estimated as 0.38% per act, and of male-to-female transmission as 0.30% per act; the equivalent estimates for high-income countries are 0.04% per act for female-to-male transmission, and 0.08% per act for male-to-female transmission.
Nos países pobres, o risco de transmisión de muller a home estímase do 0,38% por acto, e de home a muller é de 0,30% por acto; os datos equivalentes estimados para os países con maior renda son 0,04% por acto de muller a home, e 0,08% por acto de home a muller.