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.
In children who are infected with HIV at or before birth, symptoms may emerge within a couple of years. Untreated children may have delayed development and be frequently ill. Pneumonia is common in children born with HIV. If still left untreated, HIV can progress to AIDS, the most advanced stages of HIV infection.