Ulrikka Nygaard

COVID-19 in children and adolescents in Europe: a multinational, multicentre cohort study

Florian Götzinger, Begoña Santiago, Antoni Noguera‐Julián et al. · The Lancet Child & Adolescent Health · 2020 · 1.3K citations · Full text

Epidemiological Trend, Virus Epidemiology, Pediatric Epidemiology +9

Long COVID symptoms in SARS-CoV-2-positive adolescents and matched controls (LongCOVIDKidsDK): a national, cross-sectional study

Selina Kikkenborg Berg, Susanne Dam Nielsen, Ulrikka Nygaard et al. · The Lancet Child & Adolescent Health · 2022 · 167 citations · Full text

Long Covid, Virus Epidemiology, Covid-19 Pandemic +8

Long COVID symptoms in SARS-CoV-2-positive children aged 0–14 years and matched controls in Denmark (LongCOVIDKidsDK): a national, cross-sectional study

Selina Kikkenborg Berg, Pernille Palm, Ulrikka Nygaard et al. · The Lancet Child & Adolescent Health · 2022 · 139 citations · Full text

Long Covid, Virus Epidemiology, Pediatric Epidemiology +8

Methylated metabolites of 6-mercaptopurine are associated with hepatotoxicity*1

Ulrikka Nygaard · Clinical Pharmacology & Therapeutics · 2004 · 126 citations

Hospital admissions and need for mechanical ventilation in children with respiratory syncytial virus before and during the COVID-19 pandemic: a Danish nationwide cohort study

Ulrikka Nygaard, Ulla Birgitte Hartling, Jens Peter Nielsen et al. · The Lancet Child & Adolescent Health · 2023 · 106 citations · Full text

Hospitalization, Hospital Admissions, Pediatric Epidemiology +11