In one of the only known photos of Abraham Lincoln taken on the day of the Gettysburg Address, Lincoln can be seen seated, hatless, just below and to the right of the flag. Lincoln began developing symptoms of smallpox on the train home to Washington, DC.
Presidential Pox, 1863
Annie Melchor | Dec 1, 2021
Researchers continue to debate whether US president Abraham Lincoln was coming down with smallpox as he delivered his famous Gettysburg Address, and if he had been immunized.
building sign
Johnson & Johnson Vaccine Garners First Full Approval
Chloe Tenn | Nov 24, 2021
Health Canada has given the single COVID-19 shot the official greenlight for use in people 18 and older.
Colorized scanning electron micrograph of Salmonella bacteria in intestinal tissue
Gut Infections Help Shield Intestinal Neurons from Future Damage
Annie Melchor | Nov 19, 2021
In mice, a kind of immune memory appears to protect the cells against future harm, a finding that could provide insight into treatments for irritable bowel syndrome and other inflammatory digestive conditions.
orange and blue cell image
Woman’s Body Appears to Rid Itself of HIV
Chloe Tenn | Nov 18, 2021
Researchers report what appears to be the second case of a person’s immune system clearing the virus on its own.
The lungfish has a beige face and grey spotted body with a darker tail fin, as well as four long, spindly appendages. It is on a white background.
Lungfish Cocoons Are Alive, Sort Of
Abby Olena | Nov 17, 2021
Researchers find that the protective outer layer that lungfish make to survive extended dry periods—once thought to be a simple mucus shell—contains immune cells that trap bacteria and protect the animals from infection.
Isolated Realistic Coronavirus Covid-19 Molecule in a Biological Environment stock photo
Tweak to N Protein Makes Delta Variant More Infectious
Chloe Tenn | Nov 5, 2021
Using a novel lab technique, researchers identified a mutation that allows the virus to insert more genetic material into host cells.
illustration of people of different genders and races
Does Biological Sex Influence COVID-19 Outcomes?
Annie Melchor | Nov 2, 2021
It’s unclear whether differing odds of dying between men and women reflect inherent differences between male and female immune systems or differences rooted in gender norms.
Red blood cells are pictured in grayscale on a gray background
Red Blood Cells Activate Innate Immune System
Abby Olena | Oct 20, 2021
Researchers link the ability of the cells to bind and present DNA from pathogens and cell death to anemia, which is common in COVID-19, and immune activation.
Human kidney in hands stock photo
Surgeons Successfully Transplant a Pig Kidney into a Person
Chloe Tenn | Oct 20, 2021
The achievement bolsters hopes that nonhuman animals could be used to remedy the shortage of transplantable organs.
A watercolor of a baby in a heart-shaped womb
Sex of Fetus Affects Immune Response to COVID-19 During Pregnancy
Amanda Heidt | Oct 20, 2021
Male placentas produce more proinflammatory molecules than female placentas, while people carrying male fetuses produce fewer antibodies in response to infection, a study finds.
white adult mouse with 4 pups on white background
Mice that Survive Infection Pass on Stronger Immunity
David Adam | Oct 18, 2021
Offspring of animals subjected to a real or simulated pathogen were more able to fend off disease, a study finds.
illustration of a coronavirus and antibodies
When the Immune Response Makes COVID-19 Worse
Alejandra Manjarrez | Sep 27, 2021
If the immune system makes mistakes—reacting late or getting the target wrong—it can amplify the damage wrought by SARS-CoV-2.
moderna and pfizer vaccine vials
Moderna vs. Pfizer: Is There a “Best” mRNA Vaccine?
Alejandra Manjarrez | Sep 24, 2021
Both of the mRNA vaccines available in the US are highly effective against severe COVID-19, but recent studies suggest that Moderna’s elicits a stronger immune response and might be better at preventing breakthrough infections.  
Man sitting on bed with his head in his hands
NIH Grants $470 Million for Study of Long COVID
Lisa Winter | Sep 16, 2021
The study aims to recruit 40,000 adults and children to get a better sense of the condition that can last weeks or months after infection.