a purple substance is shown on a black background

Human Natural Killer Cell Scanning electron micrograph of a human natural killer cell, Halloween! Credit: NIAID https://www.flickr.com/photos/niaid/51629255901/

National Institute of Allergy and Infectious Diseases

Kristine Wook

Towfiqu barbhuiya

a hand holding a small bottle of vitamin oil

A bottle if In Essence ie: immune essential oil. It is a 9mL bottle pinched between two fingers, with a bright exterior at sunset in the background.
This essential oil blend contains: lemon, eucalyptus, sweet marjoram, and sandalwood oils.

Jacob Spaccavento

a purple and green string sculpture on a white surface

Model of the VRC01 Antibody Model of the VRC01 antibody. Credit: NIAID https://www.flickr.com/photos/niaid/26195866553/

Macrophage Scanning electron micrograph of a macrophage, colorized in Halloween colors. Stay safe and have a Happy Halloween! Credit: NIAID https://www.flickr.com/photos/niaid/51629906389/

woman holding green and white labeled bottle

Dwi Agus Prasetiyo

a red and blue substance on a gray surface

T Regulatory Cells Scanning electron microscope image of T regulatory cells (red) interacting with antigen-presenting cells (blue). T regulatory cells can suppress responses by T cells to maintain homeostasis in the immune system. Credit: NIAID https://www.flickr.com/photos/niaid/33031032718/

Immunity