The purpose of this research study is to create a decision-making tool that will help doctors decide which children with headaches require a CT ("CAT scan," "computed tomography") or MRI scan of their head as part of their emergency department care.
The HIV Vaccine Trials Network, Division of AIDS, and Columbia University Irving Medical Center are conducting a trial to learn about the safety and effectiveness of two new experimental HIV vaccines. This is a first-in-human phase 1 clinical trial where we will be testing 2 study vaccines, CH505M5 N197D mRNA-gp160 and CH505 TF mRNA-gp160. The goal is to…