Yes
1 HIV testing for babies born to women with HIV is recommended at 14 to 21 days after birth, at 1 to 2 months, and again at 4 to 6 months. 2  The test used (called a virologic HIV test) looks directly for HIV in the blood. 3  Results on two virologic tests must be negative to be certain that a baby is not infected with HIV. Within 6 to 12 hours after birth, babies born to women with HIV receive an HIV medicine called zidovudine (brand name: Retrovir). In general, the babies receive zidovudine for 6 weeks. In certain situations, a baby may receive other HIV medicines in addition to zidovudine. 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.  If you are a woman living with HIV, you can greatly lower your risk of passing HIV to your baby by taking a combination of HIV medicines (called antiretroviral therapy or ART), during pregnancy, labor, and delivery. If you are HIV-negative woman but your partner has HIV, ask your health care provider about PrEP, a daily pill that can prevent HIV during conception and pregnancy. Encourage your partner to get and stay on ART, which greatly reduces the chance that your partner will pass HIV to you. 1 HIV-negative (not infected with HIV) : 2  To know for certain that a baby is not infected with HIV, results on two virologic tests must be negative. 3  The first negative result must be from a test done when a baby is 1 month or older, and the second result from a test done when a baby is 4 months or older. Within 6 to 12 hours after birth, babies born to women with HIV receive an HIV medicine called zidovudine (brand name: Retrovir). In general, the babies receive zidovudine for 6 weeks. In certain situations, a baby may receive other HIV medicines in addition to zidovudine. 1 The first negative result must be from a test done when a baby is 1 month or older and the second result from a test done when a baby is 4 months or older. 2  Results on two HIV virologic tests must be positive to know for certain that a baby is infected with HIV. Within 6 to 12 hours after birth, babies born to women with HIV receive an HIV medicine called zidovudine (brand name: Retrovir). In general, the babies receive zidovudine for 6 weeks. In certain situations, a baby may receive other HIV medicines in addition to zidovudine. How soon after birth are babies born to women with HIV tested for HIV? HIV testing is recommended at 14 to 21 days after birth, at 1 to 2 months, and again at 4 to 6 months. The test used (called a virologic HIV test) looks directly for HIV in the blood. Within 6 to 12 hours after birth, babies born to women with HIV receive an HIV medicine called zidovudine (brand name: Retrovir). In general, the babies receive zidovudine for 6 weeks. In certain situations, a baby may receive other HIV medicines in addition to zidovudine. A negative HIV antibody test result for your baby at 18 months of age is the final test that is done to confirm that the baby is not infected. By the age of 24 months, if there are any HIV antibodies present in a child, this will be because the child has HIV. The HIV antibody test is not used to diagnose HIV in babies and young infants. This is because antibodies can cross the placenta from mother to infant and be present in the baby’s blood for up to 18 months after he or she is born. The lower the mother's viral load during pregnancy and birth, the lower the risk of infecting her baby. A baby's chances of being born with HIV are less than 2 in 100 when the mother has a viral load so low that it's undetectable. After delivery, the infant should receive ART for 6 weeks. Yes, they can. Although HIV can pass from an HIV-infected mother to her child during pregnancy, at the time of birth, or when breast-feeding the infant, medical treatment of both the mother and her infant can minimize the chances of that happening. Babies born to HIV positive mothers will always test HIV positive at first if the usual antibody tests are used. This is because they share their mum’s antibodies. If your baby is not infected with HIV these will gradually disappear. This can sometimes take as long as 18 months. The best test for HIV in babies is very similar to a viral load test. Called an HIV PCR DNA test, it looks for virus in the baby’s blood rather than at immune responses. Good practice in the UK is to test babies the day they are born, and then when they are six weeks and three months old. To check the baby is HIV negative. HIV PCR DNA – a polymerase chain reaction (PCR) test is a highly sensitive test that detects tiny amounts of HIV DNA in blood plasma. The test will “amplify” or multiply HIV DNA in the test tube so that it can be more easily detected. 1 Until you know that your baby is HIV-positive or HIV-negative, ask your pediatric HIV specialist if your baby might benefit from anti-HIV medicines. 2  New research shows that putting a newborn on a 2- or 3-drug anti-HIV medicine plan cuts the infant's risk of HIV by 50 percent (compared to using one drug only). 
https://aidsinfo.nih.gov/education-materials/fact-sheets/24/71/preventing-mother-to-child-transmission-of-hiv-after-birth http://www.aidsmap.com/Mother-to-baby-transmission/page/1044918/ https://www.aids.gov/hiv-aids-basics/staying-healthy-with-hiv-aids/friends-and-family/having-children/ https://aidsinfo.nih.gov/education-materials/fact-sheets/24/71/preventing-mother-to-child-transmission-of-hiv-after-birth https://aidsinfo.nih.gov/education-materials/fact-sheets/24/71/preventing-mother-to-child-transmission-of-hiv-after-birth https://aidsinfo.nih.gov/education-materials/fact-sheets/24/71/preventing-mother-to-child-transmission-of-hiv-after-birth http://www.aidsmap.com/HIV-testing-for-babies-and-children/page/1060202/ http://www.hiv.va.gov/patient/faqs/HIV-positive-parents-having-HIV-negative-child.asp http://i-base.info/guides/pregnancy/hiv-negative http://womenshealth.gov/hiv-aids/living-with-hiv-aids/pregnancy-and-hiv.html
can a baby be born HIV positive and then be HIV negative