A social worker shows a photo of Britain's Prince Charles to a woman during a memory activity at the Cuidem La Memoria elderly home, which specializes in Alzheimer patients, in Barcelona, Spain. Photo: David Ramos/Getty Images

An international team of researchers has found that a newly developed blood test is highly accurate in aiding the detection of Alzheimer's disease.

Why it matters: The test could distinguish Alzheimer's from other conditions, and may be able to detect changes in the brain 20 years before dementia symptoms occur, per the study findings, published in the Journal of the American Medical Association (JAMA) Tuesday.

What they're saying: Current assessment tools, such as PET scans and spinal fluid analyses, are invasive and costly. Maria Carrillo, chief science officer at the Alzheimer's Association said in a statement that this more affordable and widely available test would be "game changing for individuals, families and our healthcare system."

  • Oskar Hansson, from Lund University in Sweden, said that once verified and confirmed, the test could open up the possibility of early diagnosis of Alzheimer’s before the dementia stage.

What they did: The test measures a form of the tau protein, tangled bundles of fibers that spread in the brains of Alzheimer's patients, in more than 1,400 cases involving groups from the U.S., Sweden and Colombia.

Yes, but: Scientists are still trying to determine the role of tau proteins in Alzheimer's and so more long-term testing is needed on a larger scale, such as clinical trials.

The bottom line: Carrillo noted that while these early results, presented at the Alzheimer’s Association International Conference on Tuesday, are encouraging, "we do not yet know how long it will be until these tests are available for clinical use."

Go deeper: Chasing the elusive causes of Alzheimer's disease

Go deeper

GOP plans "nightly surprise" for revamped convention

President Trump at the 2016 Republican National Convention. Photo: Bill Clark/Getty Images

The reworked Republican National Convention will be a four-night spectacle including still-under-wraps venues, a 10 p.m. "nightly surprise" and guests and themes playing to "the forgotten men and women of America," two senior Trump campaign officials involved tell Axios.

Driving the news: The messaging will focus heavily on "very granular details" of what a second term for President Trump would look like — answering a question Trump left hanging in a Fox News event earlier this summer — and attack cancel culture, "radical elements" of society and threats to public safety.

39 mins ago - Health

Axios-Ipsos poll: Fear of voting

Data: Axios/Ipsos poll; Note: ±3.0% margin of error for the total sample; Chart: Andrew Witherspoon/Axios

Democrats are twice as likely as Republicans to worry about in-person voting — with nearly two in three seeing it as a large or moderate risk to their health — according to this week's installment of the Axios-Ipsos Coronavirus Index.

Why it matters: This could pose a significant disadvantage for Joe Biden and other Democratic candidates in November if the pattern holds — especially in states where high infection rates persist, or where there are significant hurdles to mail-in, absentee or early voting.

Trump: Coronavirus is "under control"

President Trump said in an interview with “Axios on HBO” that he thinks the coronavirus is as well-controlled in the U.S. as it can be, despite dramatic surges in new infections over the course of the summer and more than 150,000 American deaths.

  • “They are dying, that's true. And you have — it is what it is. But that doesn't mean we aren't doing everything we can. It's under control as much as you can control it. This is a horrible plague,” he told Axios' Jonathan Swan.