A hotbed of immune system activity (IMAGE) Boston Children's Hospital Caption Immune cells (in green) on the mouse choroid plexus, with blood vessels in red. Credit Shipley et al., Neuron 2020, https://doi.org/10.1016/j.neuron.2020.08.024 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.