The Centers for Disease Control and Prevention accepted a controversial recommendation from outside vaccine advisers to tighten guidelines for the COVID vaccine.
Access to the COVID-19 vaccines remains difficult because of an unusual and unexplained delay by the Centers for Disease Control and Prevention in accepting recommendations from its advisers.
Scientists created the eggs using DNA from adult skin cells, a step that could someday potentially lead to new ways to treat infertility and enable gay couples to have genetically related children.