Biology is usually the first science high school students are taught because it has less of a focus on math than other science subjects, so freshman have time to develop their math skills before moving on to more math-focused sciences.
HIV can be transmitted from an HIV-positive woman to her child either during pregnancy, or during labour and delivery, or by breastfeeding.In Europe and the USA, about 15 to 20% of babies born to HIV-positive women who are not taking anti-HIV drugs are infected.IV can be transmitted from an HIV-positive woman to her child either during pregnancy, or during labour and delivery, or by breastfeeding.
Breastfeeding is usually the healthiest choice for both infants and mothers. However, HIV transmission can occur during breastfeeding, with chances of transmission increasing the longer the infant is breastfed. 10-20% of HIV-infants breastfed by HIV+ mothers will become infected.