Agnar Helgason

ORCID: 0000-0002-8545-3767
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About
Contact & Profiles
Research Areas
  • Genetic Associations and Epidemiology
  • Forensic and Genetic Research
  • Genetic diversity and population structure
  • Genomics and Rare Diseases
  • Genomic variations and chromosomal abnormalities
  • Cancer Genomics and Diagnostics
  • Genomics and Chromatin Dynamics
  • Epigenetics and DNA Methylation
  • Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Genetics and Neurodevelopmental Disorders
  • Genetic and phenotypic traits in livestock
  • DNA Repair Mechanisms
  • Chromosomal and Genetic Variations
  • Evolution and Genetic Dynamics
  • Genomics and Phylogenetic Studies
  • SARS-CoV-2 and COVID-19 Research
  • CRISPR and Genetic Engineering
  • Race, Genetics, and Society
  • Genetic Mapping and Diversity in Plants and Animals
  • Archaeology and ancient environmental studies
  • Forensic Anthropology and Bioarchaeology Studies
  • melanin and skin pigmentation
  • RNA and protein synthesis mechanisms
  • Genetic factors in colorectal cancer
  • Nutrition, Genetics, and Disease

deCODE Genetics (Iceland)
2016-2025

University of Iceland
2016-2025

Amgen (Germany)
2022-2023

Directorate of Health
2020

National University Hospital of Iceland
2020

University of Oxford
1998-2003

BackgroundDuring the current worldwide pandemic, coronavirus disease 2019 (Covid-19) was first diagnosed in Iceland at end of February. However, data are limited on how SARS-CoV-2, virus that causes Covid-19, enters and spreads a population.MethodsWe targeted testing to persons living who were high risk for infection (mainly those symptomatic, had recently traveled high-risk countries, or contact with infected persons). We also carried out population screening using two strategies: issuing...

10.1056/nejmoa2006100 article EN New England Journal of Medicine 2020-04-14

Little is known about the nature and durability of humoral immune response to infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).We measured antibodies in serum samples from 30,576 persons Iceland, using six assays (including two pan-immunoglobulin [pan-Ig] assays), we determined that appropriate measure seropositivity was a positive result both pan-Ig assays. We tested 2102 collected 1237 up 4 months after diagnosis by quantitative polymerase-chain-reaction (qPCR)...

10.1056/nejmoa2026116 article EN New England Journal of Medicine 2020-09-01

Sequence variants in the parental genomes that are not transmitted to a child (the proband) often ignored genetic studies. Here we show nontransmitted alleles can affect through their impacts on parents and other relatives, phenomenon call "genetic nurture." Using results from meta-analysis of educational attainment, find polygenic score computed for 21,637 probands with at least one parent genotyped has an estimated effect attainment proband is 29.9% (P = 1.6 × 10-14) score. Genetic...

10.1126/science.aan6877 article EN Science 2018-01-25

10.1038/ng2062 article EN Nature Genetics 2007-07-01
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