COVID: How many parents will actually vaccinate their kids? The early data makes a clear case for vaccinating adolescents. But it's also true that humans have an extremely difficult time making a medical choice on another person's behalf — and sometimes default to doing nothing. Parents are likely facing a big choice soon: To vaccinate or not to vaccinate "My child is not a lab rat." The words are from a 25-year-old woman, Susan, and they're in reference to her three-year-old twin girls. While she speaks to DW, her eyes flicker between them as they begin to meander away — first together, then in different directions — in a large, open park in Bonn, Germany.