Neanderthal DNA surprises in modern humans, the first blood test for Alzheimer’s, a discovery of new human salivary glands, and, oh yeah, a pandemic

SARS-CoV-2 antibodies detected in blood donor samples indicate infections could have occurred in the US more than a month before the first confirmed case, but some experts remain skeptical.

The test will be a cheaper and more accessible alternative to currently available diagnostic tools, researchers say.

New studies show that elevated levels of a form of tau called p-tau217 can accurately distinguish Alzheimer’s disease from other forms of dementia, and perhaps even predict it.

The liquid biopsy, which detects cell-free tumor DNA, spotted undiagnosed cancers in some women, but had a greater number of false positives and false negatives.

Preprints from the first round of seroprevalence studies indicate that many more people have been infected with the virus than previously reported. Some of these studies also have serious design flaws.

If governments were to use SARS-CoV-2 antibody tests to manage who can re-enter the workplace, society must accept a sacrifice of privacy.

Trophoblasts, collected from the mother during a blood draw, can determine fetal genetic abnormalities currently diagnosed through amniocentesis or chorionic villi sampling.

A look at some of the circulating molecules that may indicate various Alzheimer’s pathologies and serve as the bases of noninvasive tests for the disease.

Researchers hope circulating biomarkers will enable earlier detection and better monitoring of the neurodegenerative disorder—and perhaps help usher in new treatments.

The observation could pave the way for a blood test to predict disease progression in people with a genetic predisposition to developing the neurodegenerative disorder.

Federal prosecutors filed criminal charges that allege the company’s promise to revolutionize blood testing swindled investors out of hundreds of millions of dollars and put patients in danger.

The company raised more than $700 million based on false claims to investors, according to the complaint.

The diagnostic measures two proteins indicative of brain injury.

The test uses levels of plasma amyloid-β to estimate the buildup of protein plaques in the brain.

A newly identified marker for a common pancreatic cancer may help doctors detect the disease in its earlier stages.

The blood-testing startup settles a legal dispute with the Arizona attorney general’s office.

Researchers describe a paper-based blood test that can determine a person’s blood type in just two minutes.

Two studies describe methods for detecting these misfolded proteins in human blood samples.