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

COVID reinfection

blue gloved hand putting vial of blood into centrifuge machine
Studies Identify Risk Factors for Long COVID
Natalia Mesa | Jan 26, 2022
Two recent papers provide insight into possible risk factors for developing the chronic condition, including autoantibodies and diabetes.
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.
Past SARS-CoV-2 Infection Mostly Protects Survivors
Max Kozlov | Jan 14, 2021
A large study of UK healthcare workers finds that immunity after coronavirus infection lasts for months, but those with antibodies may still be able to carry and spread the virus upon reexposure.
More SARS-CoV-2 Reinfections Reported, But Still a Rare Event
Ashley Yeager | Oct 26, 2020
Repeat COVID-19 cases could offer clues about people’s immunity to the novel coronavirus and how to vaccinate against it.
Patients Reinfected with Coronavirus in Hong Kong, Europe
Lisa Winter | Aug 25, 2020
So far, there are three patients known to have been infected with SARS-CoV-2 twice, and in at least one case the second time around was asymptomatic.