Woman in face shield and blue gown takes cotton swab of patient's mouth, who is sitting inside parked car
What You Should Know About New Omicron Subvariants
The presence and spread of new, more-infectious and immune-evading variants show that the coronavirus is not done mutating.
ABOVE: © iStock.com, Edwin Tan
What You Should Know About New Omicron Subvariants
What You Should Know About New Omicron Subvariants

The presence and spread of new, more-infectious and immune-evading variants show that the coronavirus is not done mutating.

The presence and spread of new, more-infectious and immune-evading variants show that the coronavirus is not done mutating.

ABOVE: © iStock.com, Edwin Tan

variants of concern

images related to COVID-19 pandemic, including sign reading "please keep your distance," illustration of the virus, various pills, vaccine syringes
What We Learned About COVID-19 in 2021
Shawna Williams | Dec 16, 2021
As Omicron induces a sense of deja vu at the close of the year, we look back at a few key ways in which our understanding has moved forward.
Illustration of various colored viruses
Omicron Appears to Evade Vaccines Better Than Other Variants
Jef Akst | Dec 14, 2021
Preliminary studies suggest that existing vaccines falter in preventing symptomatic infections caused by the new coronavirus variant, but protection against severe disease is still high.
Artist’s renderings of SARS-CoV-2 float in front of a map showing the origins of various variants of the virus.
Omicron Is WHO’s Fifth Variant of Concern, Experts Urge Patience
Dan Robitzski | Nov 30, 2021
Preliminary data suggest that the newly dubbed Omicron variant may be more infectious than previous versions of the virus, but it will take time to obtain the reliable data needed to answer pressing questions about its biology.
Watercolor coronaviruses in green, red, blue, and purple are layered above an abstract background of watercolor swashes
Plenty of Evidence for Recombination in SARS-CoV-2
Abby Olena | Sep 2, 2021
Different variants of the virus behind the COVID-19 pandemic are swapping chunks of genetic material, but it’s not yet clear what implications that may have for public health.
art+graph showing rise and fall of three different covid variants
Dissecting the Unusual Biology of the SARS-CoV-2 Delta Variant
Katarina Zimmer | Aug 9, 2021
An ability to build up higher concentrations of viral particles in people’s airways and mutations that might boost its ability to infect human cells could be what gives the Delta variant its evolutionary edge.
Updated
COVID-19 vaccine vials on a map of the world indicating inequitable distribution
Wealthier Nations Disregarding WHO Call for COVID-19 Booster Moratorium
Christie Wilcox | Aug 5, 2021
The organization implored nations to wait on booster shots until the global vaccination rate increases, but several of the world’s more well-off countries have expressed their intentions to offer them regardless.
Black and white world map, with lines connecting red areas that indicate COVID-19 hotspots, along with overlaid drawings of SARS-CoV-2.
WHO Updates the Nomenclature of SARS-CoV-2 Variants
Lisa Winter | Jun 1, 2021
Rather than being described by the location of where they emerged or an alphanumeric code, variants will be given a Greek letter.