This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Nanoparticles Medical Imaging . Human red blood cells in which membrane proteins are targeted and labeled with quantum dots reveal the clustering behavior of the proteins The number of purple features which indicate the nuclei of malaria parasites increases as malaria development progresses The NIST logo at bottom was made by photo