a close up of a white substance on a blue background
––– –– ––
––– –––– ––––
––– –– ––
––– –––– ––––

a close up of a white substance on a blue background

T Lymphocyte Colorized scanning electron micrograph of a T lymphocyte. Credit: NIAID https://www.flickr.com/photos/niaid/52972114178/

Calendar outlinedPublished on SafetyFree to use under the Unsplash License

Browse premium related images on iStock | Save 20% with code UNSPLASH20