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Researchers studied the genetic structure of Viking Age Scandinavian populations, along with migrations and the adoption of Viking culture by non-Scandinavians.

The findings suggested that genomic surveillance of Barrett's esophagus could identify patients who will progress years in advance and enable earlier treatment.

Two new papers have identified thousands of genetic loci with ties to more than two-dozen blood cell traits in individuals from up to five ancestry groups.

In Science this week: researchers recover near-complete smallpox virus genomes from Viking Age-individuals, and more.

First-time mothers who did not request pain relief during labor were more likely to carry a rare variant in a potassium channel-coding gene.

Strands of Four

New Scientist reports that researchers have found a quadruple-stranded form of DNA within healthy human cells.

In Nature this week: method for studying higher-order interactions among genes from single-cell data, and more.

In one study, the UK-based firm found that its RaDaR assay detected circulating tumor DNA in lung cancer patients up to a year before standard clinical progression occurred in most of the cases. 

In Nature this week: population sequencing led to rare disease diagnoses, analysis of marine green alga leads to discovery of new phylum, and more.

The researchers found that WGS can streamline disease diagnosis and used it to discover unknown etiological variants in coding and non-coding genomic regions.

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Novavax has begun a phase III trial of its SARS-CoV-2 vaccine, according to the New York Times.

Vox reports that the Trump Administration may limit student visas for individuals from some countries to two years.

The governor of New York says the state will conduct its own review of any SARS-CoV-2 vaccine, NPR reports.

This week in Science: Neanderthal Y chromosomes replaced by Homo sapiens Y chromosomes, and more.