Man in lab coat looking at camera and smiling
Can Taking a Test Now Tell You if You’ve Already Had COVID-19?
The Scientist asks Brigham and Women’s Hospital infectious disease specialist Lindsey Baden about testing for prior infections.
Can Taking a Test Now Tell You if You’ve Already Had COVID-19?
Can Taking a Test Now Tell You if You’ve Already Had COVID-19?

The Scientist asks Brigham and Women’s Hospital infectious disease specialist Lindsey Baden about testing for prior infections.

The Scientist asks Brigham and Women’s Hospital infectious disease specialist Lindsey Baden about testing for prior infections.

ABOVE: Credit: Len Rubenstein
para-aminosalicylic acid, ecology, immunology
Artist&rsquo;s rendition of multiple <em>Neisseria gonorrhoeae</em>, the bacteria that causes gonorrhea, depicted as two spheres stuck together, each covered in tendrils.
Gonorrhea-Blocking Mutation Also Protects Against Alzheimer’s: Study
Holly Barker | Aug 5, 2022
Research traces the evolution of a gene variant that reduces the risk of Alzheimer’s disease, finding that it originally evolved in response to infectious bacteria.
Calm lake reflecting sky with boat in foreground
Plastic Pollution Boosts Bacterial Growth in Lake Water
Patience Asanga | Jul 26, 2022
A study finds that not only did aquatic bacteria thrive when chemicals washed from degrading plastic were introduced into lake water, they also broke down organic matter more efficiently.
COVID-19 vaccine vials
COVID-19 Vaccines Induce Better Long-Term Immunity than Infection
Jennifer Zieba, PhD | Aug 8, 2022
For the first time, researchers performed a head-to head longitudinal study comparing the immune response elicited by mRNA and traditional COVID-19 vaccines to primary infections.
illustration of inside of gut with floating bacteria
Finding Could Pave the Way to New, Targeted Antibody Treatments
Natalia Mesa | Jul 8, 2022
IgA antibodies appear to bind to specific species of commensal gut bacteria in mice, according to a study.
Vicu&ntilde;as <em>(Lama vicugna)</em> run across the plains in San Guillermo National Park, Argentina.
How Mange Remade an Ecosystem
Shawna Williams | Jul 5, 2022
A study traces the effects of a mite outbreak from the earth to the heavens.
A person holding a section of his face and looking in to his brain through a magnifying glass stock illustration
Science Philosophy in a Flash - A Look at Aging Through Young Eyes 
Iris Kulbatski, PhD | Aug 8, 2022
Aimée Parker shares how her childlike curiosity and collaborative spirit motivate her scientific pursuits.
An orange-brown pineapple sea cucumber, covered in wart-like growths, rests on the seafloor in front of some coral, with a school of fish swimming overhead.
How the Sea Cucumber Defends Itself . . . From Itself
Natalia Mesa | Jul 1, 2022
The marine animals have evolved a unique molecular pathway enabling them to use toxins to fight off invaders without poisoning themselves in the process.
A section of a mouse distal colon showing luminal contents with bacteria in magenta, the mucus lining (green) and the epithelial cell barrier of the gut (blue, right).
Mapping the Neighborhoods of the Gut Microbiome
Abby Olena | Jul 1, 2022
Researchers are going beyond fecal samples to understand how the patterns of commensal microbes in the gastrointestinal tract influence development and health.
An abstract stained-glass portrait of a woman with an image of an eye representing the brain
Through the Looking Glass: Aging, Inflammation, and Gut Rejuvenation
Iris Kulbatski, PhD | Aug 8, 2022
Renewing the aging gut microbiome holds promise for preventing inflammatory brain and eye degeneration.
Photo taken from the perspective of a lab worker in a white coat and purple gloves preparing multiple fecal transplant capsules at a time.
Banking Previous Poos: Could a Transplant of Feces from Your Past Heal You?
Dan Robitzski | Jun 30, 2022
The Scientist spoke with Brigham and Women’s Hospital and Harvard Medical School researchers Scott Weiss and Yang-Yu Liu, who propose that people bank stool samples when they’re young and healthy so that they can be transplanted to rejuvenate the gut microbiome later on.
Artist&rsquo;s rendering of aquamarine T cells in front of a blue and green background.
Study Links Stress to a Faster-Aging Immune System
Margaret Osborne | Jun 21, 2022
Health data from 5,744 adults over the age of 50 reveals an association between stressors such as discrimination and a relatively small proportion of younger infection-fighting immune cells.
Motor neurons, undergoing degeneration in ALS
Mutant T Cells That Drive Amyotrophic Lateral Sclerosis (ALS) Progression May React To a Brain Antigen
Nele Haelterman, PhD | Aug 8, 2022
Scientists discovered a possibly autoreactive T cell population that forecasts and supports disease progression.
A small, brown mouse runs on a narrow, miniature treadmill
How Exercise Helps Mice Fight Pancreatic Cancer
Dan Robitzski | Jun 15, 2022
A study reveals a molecular pathway linking exercise to an amped-up immune response to pancreatic cancer and greater responsiveness to treatment.
teabag with green tag on a white background
Spilling the Tea: Insect DNA Shows Up in World’s Top Beverage
Shawna Williams | Jun 14, 2022
The Scientist speaks with Trier University’s Henrik Krehenwinkel, whose group recently detected traces of hundreds of arthropod species from a sample of dried plants—in this case, the contents of a tea bag.
The balance of mind and body on a seesaw
Psychological Stress Distracts the Immune System from Fighting Infections
Jennifer Zieba, PhD | Aug 8, 2022
Acute stress makes immune cells migrate immediately to the bone marrow, which prepares the body for injury at the expense of increasing infectious disease susceptibility.
Vaccine illustration&nbsp;
Infographic: Inducing Active Immunity Against Opioid Overdose
Tori Rodriguez | Jun 13, 2022
How scientists aim to induce an immune response against addictive drugs
Illustration of a syringe with a person falling out of a bottle of pills
Opioid Vaccines as a Tool to Stem Overdose Deaths
Tori Rodriguez | Jun 13, 2022
Researchers are turning to the immune system for help in treating addiction and preventing overdose.
Leveraging the Microbiome to Break Down Tumor Resistance
Leveraging the Microbiome to Break Down Tumor Resistance
The Scientist Creative Services Team, PerkinElmer | Aug 3, 2022
Mat Robinson and Mark Tangney discuss how enhancing the efficacy of immune checkpoint inhibitors improves patient outcomes.
Spraying spray bottle
Nasal Vaccines Are Commercially High Risk, Perhaps High Reward
Jef Akst | Jun 13, 2022
Dozens of intranasally delivered vaccines targeting SARS-CoV-2 are in development. Could they pave the way for widespread nasal vaccination in the future?