This is a digitally-colorized transmission electron micrograph (TEM) of Zika virus, which is a member of the family Flaviviridae. Virus particles, here colored red, are 40 nm in diameter, with an outer envelope, and an inner dense core. The image was created by CDC/ Cynthia Goldsmith

RMFJA9RT–This is a digitally-colorized transmission electron micrograph (TEM) of Zika virus, which is a member of the family Flaviviridae. Virus particles, here colored red, are 40 nm in diameter, with an outer envelope, and an inner dense core. The image was created by CDC/ Cynthia Goldsmith

RM2GGP79E–Colorized transmission Electron Micrograph (TEM) of endoplasmic reticulum and mitochondria in the liver of a rat.

HANDOUT - Created by CDC microbiologist Cynthia Goldsmith, this colorized transmission electron micrograph (TEM) revealed some of the ultrastructural morphology displayed by an Ebola virus virion. Photo: Cynthia Goldsmith/CDC (MANDATORY CREDIT; zu dpa: 'Bisher 14 Tote bei neuem Ebola-Ausbruch in Uganda') +++(c) dpa - Bildfunk+++

RMD694T3–HANDOUT - Created by CDC microbiologist Cynthia Goldsmith, this colorized transmission electron micrograph (TEM) revealed some of the ultrastructural morphology displayed by an Ebola virus virion. Photo: Cynthia Goldsmith/CDC (MANDATORY CREDIT; zu dpa: 'Bisher 14 Tote bei neuem Ebola-Ausbruch in Uganda') +++(c) dpa - Bildfunk+++

RFF3H86F–Colorized TEM MERS Coronavirus virions

Swine Flu Strain Virus Particles Colorized transmission electron micrograph of negatively stained SW31 (swine strain) influenza virus particles. Credi

RM2D4R6FJ–Swine Flu Strain Virus Particles Colorized transmission electron micrograph of negatively stained SW31 (swine strain) influenza virus particles. Credi

RFF3H86B–Colorized TEM MERS Coronavirus virions

Microscopic view of the Ebola virus. This colorized transmission electron micrograph view of the ultrastructural morphology displayed by an Ebola virus virion was captured by the CDC.

RME6JJKB–Microscopic view of the Ebola virus. This colorized transmission electron micrograph view of the ultrastructural morphology displayed by an Ebola virus virion was captured by the CDC.

RF2DFD2F1–Colorized transmission electron micrograph of negatively stained SW31 (swine strain) influenza virus particles. Credit: NIAID.

RMBN2XBP–Colorized transmission electron micrograph (TEM) rof an Ebola virus virion.

This transmission electron micrograph (TEM) depicted numbers of intact rotavirus double-shelled particles. Note the distinctive rim of radiating capsomeres. See PHIL 178 for a colorized version of this image. Image courtesy CDC/Dr. Erskine Palmer, 1981.

RMK1FCTC–This transmission electron micrograph (TEM) depicted numbers of intact rotavirus double-shelled particles. Note the distinctive rim of radiating capsomeres. See PHIL 178 for a colorized version of this image. Image courtesy CDC/Dr. Erskine Palmer, 1981.

RMBN46F0–Colorized negatively-stained transmission electron micrograph (TEM) of hepatitis B virus (HBV) virions

This transmission electron micrograph (TEM) revealed some of the ultrastructural morphology of a flagellated Escherichia coli O157:H7 bacterium. See PHIL 9995 for a colorized version of this image. Transmission electron micrograph of E. coli O157:H7 showing flagella. Pseudoreplica technique. Image courtesy CDC/Peggy S. Hayes., 1995.

RMK1FEE9–This transmission electron micrograph (TEM) revealed some of the ultrastructural morphology of a flagellated Escherichia coli O157:H7 bacterium. See PHIL 9995 for a colorized version of this image. Transmission electron micrograph of E. coli O157:H7 showing flagella. Pseudoreplica technique. Image courtesy CDC/Peggy S. Hayes., 1995.