A 3D print of a SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19—virus particle. The virus surface (blue) is covered with spike proteins (red) that enable the virus to enter and infect human cells. For more information, visit the NIH 3D Print Exchange at 3dprint.nih.gov.

Health Protection Measures infographic. (U.S. Air Force Graphic by Rosario "Charo" Gutierrez)

U.S. House of Representatives Congressman, Honorable Mike Conaway, is presented a check as a donation from Senior Master Sgt. Charmane Tatum, vice president of the Goodfellow Top 3, for the Concho Valley Home for Girls during the 17th Training Wing Annual Awards Ceremony at the McNeese Convention Center in San Angelo, Texas, Feb. 21, 2020. This donation was made in Conaway’s name as a thank you for speaking at the event. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Lt. Col. Kevin Boss, 17th Training Group director of operations, presents the 315th Training Squadron Officer Student of the Month award to 2nd Lt. Dreyton Schafer, 315th TRS student, at Brandenburg Hall on Goodfellow Air Force Base, Texas, February 6, 2020. The 315th TRS’ vision is to develop combat-ready intelligence, surveillance and reconnaissance professionals and promote an innovative squadron culture and identity unmatched across the U.S. Air Force. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Lt. Col. Kevin Boss, 17th Training Group director of operations, presents the 17th Training Group Rope of the Month award to Airman 1st Class Jeremy Nelson, 316th TRS student, at Brandenburg Hall on Goodfellow Air Force Base, Texas, February 6, 2020. Military Training Leaders present different ropes to Airmen who display exceptional qualities to lead their peers in various aspects of the training pipeline. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Lt. Col. Kevin Boss, 17th Training Group director of operations, presents the 316th Training Squadron Student of the Month award to Airman 1st Class Jakob Volcheck, 316th TRS student, at Brandenburg Hall on Goodfellow Air Force Base, Texas, February 6, 2020. The 316th TRS’ mission is to conduct U.S. Air Force, U.S. Army, U.S. Marine Corps, U.S. Navy and U.S. Coast Guard cryptologic, human intelligence and military training. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Lt. Col. Kevin Boss, 17th Training Group director of operations, presents the 312th Training Squadron Student of the Month award to Airman Alex Alvarado, 312th TRS student, at Brandenburg Hall on Goodfellow Air Force Base, Texas, February 6, 2020. The 312th TRS’ mission is to provide Department of Defense and international allies with mission ready fire protection and special instruments graduates and provide mission support for the Air Force Technical Applications Center. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Lt. Col. Kevin Boss, 17th Training Group director of operations, presents the 315th Training Squadron Student of the Month award to Airman 1st Class Mathieu Sherburne, 315th TRS student, at Brandenburg Hall on Goodfellow Air Force Base, Texas, February 6, 2020. The 315th TRS’ vision is to develop combat-ready intelligence, surveillance and reconnaissance professionals and promote an innovative squadron culture and identity unmatched across the U.S. Air Force. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Col. Lauren Bryd, 17th Medical Group commander, presents Senior Master Sgt. select Melissa Grino, 17th Operational Medical Readiness Squadron dental fight chief, with her certificate indicating her line number during the senior master sgt. release party at the event center on Goodfellow Air Force Base, Texas, March 3, 2020. This year out of 15,544 only 1,184 individuals were selected to progress from the rank of master sgt. to senior master sgt. (U.S. Air Force photo by Senior Airman Seraiah Wolf)

U.S. Air Force Col. Lauren Bryd, 17th Medical Group commander, presents Senior Master Sgt. select John Brahm, 17th Communications Squadron flight chief, with a certificate indicating his line number during the senior master sgt. release party at the event center on Goofellow Air Force Base, Texas, March 3, 2020. A line number indicates when the individual will officially promote to the rank that they have earned. (U.S. Air Force photo by Senior Airman Seraiah Wolf)

U.S. Air Force Senior Master Sgt. select Melissa Grino, 17th Operational Medical Readiness Squadron dental flight chief, fist bumps coworkers and friends who came to support her during the senior master sgt. release party at the event center on Goodfellow Air Force Base, Texas, March 3, 2020. Senior master sgt. is in the highest tier of the enlisted rank structure and only one rank away from the highest enlisted rank in the Air Force. (U.S. Air Force photo by Senior Airman Seraiah Wolf)

U.S. Air Force Senior Master Sgt. select John Brahm, 17th Communications Squadron flight chief, runs through an aisle of supporters, coworkers and family during the Senior Master Sgt. release party at the event center on Goodfellow Air Force Base, Texas, March 3, 2020. The aisle allowed everyone to fist bump and high-five the selectees before they received their certificates. (U.S. Air Force photo by Senior Airman Seraiah Wolf)

A telegraph is displayed during the 316th Training Squadron’s Inaugural Language Fair February 28, 2020, at the event center on Goodfellow Air Force Base, Texas. This display allowed students and permanent party members to learn more about the importance of Morse code and the telegraph. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

A plate of German Lebkuchen cookies is displayed during the 316th Training Squadron’s Inaugural Language Fair February 28, 2020, at the event center on Goodfellow Air Force Base, Texas. Students and staff provided a multitude of snacks and desserts from around the world to share different cultures with attendees. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

Lance Cpl. Gunther Hoshijo, 316th Training Squadron Pashto linguist student, participates in an exercise during the 316th TRS’ Inaugural Language Fair February 28, 2020, at the event center on Goodfellow Air Force Base, Texas. Pashto is a member of the southeastern Iranian branch of Indo-Iranian languages spoken in Afghanistan, Pakistan and Iran. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

Korean linguist students from the 316th Training Squadron participate in an exercise during the 316th TRS’ Inaugural Language Fair February 28, 2020, at the event center on Goodfellow Air Force Base, Texas. One student would describe in their target language what had to be drawn, while the other, without viewing the original, did their best to recreate the image just by what the speaker said. (U.S. Air Force photo by Airman 1st Class Robyn Hunsinger)

U.S. Air Force Senior Airman Brianna Cash, 17th Comptroller Squadron financial analyst, shows a page from “Hunches in Bunches” to a fifth grade class at McGill Elementary School in San Angelo, Texas, Feb. 27, 2020. Older students enjoy the readings because it is a break from the fast tempo of school and they have a chance to interact with someone that may have the job they want. (U.S. Air Force photo by Airman 1st Class Ethan Sherwood)

U.S. Air Force Airman 1st Class Rachel Tomlin, 17th Force Support Squadron customer support technician, reads to a class at McGill Elementary School, San Angelo, Texas, Feb. 27, 2020. (Courtesy photo)

Members of the Goodfellow community present their books before reading to their various classrooms at McGill Elementary School in San Angelo, Texas, Feb. 27, 2020. The annual event is one looked forward to by the community, the kids, and the teachers. (U.S. Air Force photo by Airman 1st Class Ethan Sherwood)

U.S. Air Force Senior Airman Brianna Cash, 17th Comptroller Squadron financial analyst, reads “Hunches in Bunches” to a fifth grade class at McGill Elementary School in San Angelo, Texas, Feb. 27, 2020. Cash was one of 39 volunteers who read to and interacted with the students. (U.S. Air Force photo by Airman 1st Class Ethan Sherwood)