Vaccination epidemiology

In 2019, the WHO put vaccine scepticism on their top 10 list of global threats to public health. We experienced it ourselves in Denmark when introducing the HPV vaccine, and there has been discussions in connection with vaccination against COVID-19.

When we introduce vaccines to a large number of citizens, symptoms that actually have other causes may occur in temporal relations with the vaccines, just by accident. If the true causes of the symptoms are unclear, then the vaccine will often be a tangible explanation in the hunt for a cause. Thus, our research aims to contribute to greater confidence in the vaccination programme by identifying the actual side effects and by rejecting side effects that have other causes.

Research areas

We have a particular focus on non-specific symptoms. We often cannot find information about these in the registers, and, it is therefore necessary to collect the information directly from the citizens.

Currently, our research focuses on two projects:

Possible side effects from Corona vaccine
Possible causes of symptoms after HPV vaccination

Recent publications

Sort by: Date | Author | Title

Melgaard, A., Vestergaard, C. H., Kesmodel, U. S., Risør, B. W., Forman, A., Zondervan, K. T., Nath, M., Ayansina, D., Saunders, P. T. K., Horne, A. W., Saraswat, L. & Rytter, D. (2025). Exploring pre-diagnosis hospital contacts in women with endometriosis using ICD-10: a Danish case-control study. Human reproduction (Oxford, England), 40(2), 280-288. Article deae273. https://doi.org/10.1093/humrep/deae273

Mansoori, M., Rocha Exposto, C., Hammer Bech, B., Frodi Olsen, S., Ahrendt Bjerregaard, A. & Baad-Hansen, L. (2025). Is poor dietary quality in adolescence a risk factor for painful temporomandibular disorders and headaches in young adulthood? A prospective study in the Danish National Birth Cohort. Headache, 65(5), 731-744. https://doi.org/10.1111/head.14899

Noone, A., Dowling, K., O'Boyle, D., Carter, M., Golubeva, A. V., Scaife, C., Bech, B. H., Henriksen, T. B., Gallagher, L., Mooney, C., Khashan, A. S., Murray, D. M. & English, J. A. (2025). Longitudinal multi-omics analysis of umbilical cord blood and childhood serum in Autism. Molecular Psychiatry. https://doi.org/10.1038/s41380-025-03157-z

Dueholm Hjorth, I. M., Bech, B. H., Ledger, A., Møller, C., Van den Bosch, T. & Mogensen, O. (2025). OC18.05: *Systematic ultrasound and diagnostic models for improved diagnosis of ovarian malignancy in general gynecological settings: a Danish prospective multicenter study. Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology, 66(S1), 50-53.

Jensen, C. B., Hansen, K. T., Bech, B. H., Hansen, S. N., Nielsen, H., Rask, C. U., Fink, P., Dantoft, T. M., Jørgensen, T., Labrecque, J. A., Thysen, S. M. & Rytter, D. (2025). Post-acute non-specific symptoms following COVID-19 vaccination: a Danish population-based study. International Journal of Epidemiology, 54(5), Article dyaf173. https://doi.org/10.1093/ije/dyaf173

Chandia-Poblete, D., Tuffier, S., Vryonidis, E., Halldorsson, T. I., Bjerregaard, A. A., Rytter, D., Bech, B. H., Henriksen, T. B., Olsen, S. F., Törnqvist, M. & Pedersen, M. (2025). Prenatal Exposure to Acrylamide, Fetal Growth and Newborn Size: A Biomarker-based Cohort Study from Denmark. Environmental Research, 286, Article 122996. https://doi.org/10.1016/j.envres.2025.122996

Exposto, C. R., Mansoori, M., Bech, B. H., Bjerregaard, A. A., Olsen, S. F. & Baad-Hansen, L. (2025). Pre-natal nutrition as risk factor for painful temporomandibular disorders and headaches in young adults. Headache. https://doi.org/10.1111/head.15030

Displaying results 8 to 14 out of 327

Search the department's publications

Group members

Contact

BiCoVac

A research project that aims to clarify frequency of symptoms among vaccinated vs. unvaccinated persons.

Revised 22.01.2026

Web team at Health