Adverse reaction reports summarise all reports of suspected adverse reactions that we have assessed. Events following vaccination are reported on the basis of suspicions, which means that there is not necessarily any causal relationship. The challenge is to distinguish symptoms and medical conditions which occur randomly from those which could be linked to vaccination.

All reports are included in the report, regardless of whether or not the event is believed to be linked to vaccination.
Reports of serious events are assessed first. The figures therefore do not give a true picture of the distribution between serious and non-serious events.

Click here to go to an overview of reports of suspected adverse reactions (the adverse reactions report)

Booster doses for the elderly and nursing home residents

The Norwegian Institute of Public Health (NIPH) has recommended booster doses for the elderly aged 65 upwards and nursing home residents. Elderly patients benefit greatly from vaccination, because they are at high risk of serious illness and death from COVID-19 infection. For most people in this group, the benefits of protection against severe COVID-19 disease will outweigh the risk of any side effects. However, for elderly people living with frailty, common adverse reactions to the vaccines, such as fever and nausea, can have serious consequences.

- “Health professionals must carry out a risk-benefit assessment regarding the vaccination of very frail patients. For those with a short life expectancy, the benefits of a booster dose can be marginal. End of life patients should not be vaccinated,” emphasises Senior Consultant Sigurd Hortemo.

NIPH recommends a one-week gap between vaccination with influenza vaccine and a booster COVID-19 vaccine dose. The booster COVID-19 dose must not be at the expense of influenza vaccination.

See the information on booster doses for the elderly and nursing home residents in NIPH’s vaccination guide

See the information on assessing frailty before giving a booster dose to the very elderly in NIPH’s information letter

Suspected long-term adverse reactions

The Norwegian Medicines Agency receives reports of symptoms such as headaches that have lasted for several weeks. Headaches following vaccination are common, but no causal relationship between vaccination and prolonged headaches has been confirmed. The information we have about possible long-term adverse reactions following COVID-19 vaccination is currently limited.

-“The adverse reaction reports provide a snapshot of the situation. In order for us to establish whether or not the symptoms are long-term in nature, either the doctor or the person who has been vaccinated must submit another report. The doctor will have experience and a knowledge of the patient and be able to provide us with the supplementary information we need to assess a possible link to the vaccine," says Senior Consultant Sigurd Hortemo.

Report adverse reactions on behalf of children 

Children under 16: Parents and guardians can report adverse reactions on behalf of their children.

Children over 16: Young people over the age of 16 can report adverse reactions themselves, but they will need an electronic ID, such as Bank-ID. Parents can report adverse reactions if a power of attorney has been set up. Power of attorney can be set up digitally at

Find out more about representing other people at​​

How to report adverse reactions

Click here for a link to the report form and more information on how to report adverse reactions

Please remember to include the following information when reporting adverse reactions:

  • name of the vaccine and date of vaccination
  • detailed description of the sequence of events
  • when the adverse reaction first started
  • whether the reaction is persistent or has passed
  • other current medical conditions and medication
  • if/when a COVID-19 test has been taken, and the result
  • whether the reaction occurred after the first or second dose
  • whether a different type of vaccine was given as the second dose
  • the results of any blood tests or other medical investigations
  • whether a doctor has been contacted (for those submitting a “patient report” via

It is particularly important to report reactions where any of the following are suspected:

  • adverse reactions not referred to in the patient information leaflet
  • unexpected adverse reactions
  • serious adverse reactions
  • vaccine failure (severe COVID-19 following full vaccination)

Health professionals are obliged to report serious, new and unexpected reactions which they suspect may be caused by a vaccine.

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