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Influenza vaccine

What is influenza?

Influenza (also known as the flu) is a disease caused by infection with the influenza virus. The virus is highly contagious and is transmitted via droplets from coughing, sneezing, and the like.

The disease is transmitted when you breathe virus particles or get them on your hands and then touch your eyes, nose, or mouth. Influenza infects also by a direct contact like handshakes, kisses, etc.

If you become infected, the flu will break out within 1-4 days. You can infect others, from the moment you get the first symptoms and will typically infect most in the first few days.


Influenza is indicated by a sudden rise in body temperature (over 38 ° C), muscle pain, chills, headache, sore throat, and, in some cases, vomiting and diarrhea. The illness typically lasts for 2-7 days.

For most, influenza should not be a cause of concern, but for some, it can be very serious and lead to hospitalization and even death. Therefore, it is important to follow health recommendations about hygiene and to be aware of danger signs.

The risk of contracting influenza

An ordinary influenza epidemic lasts 4-6 weeks in the winter months from December to March. One in five people will typically get the flu. Every year, 1000-2000 people die, on average, in Denmark of complications related to influenza.

Protect yourself against influenza

It is possible to prevent influenza. First, you should wash your hands, cough and sneeze into disposable tissues or your sleeves, and partly, influenza can be prevented with vaccination.

The Influenza vaccine is given as an injection. From when you are vaccinated, it typically takes 2-3 weeks before you are protected. The vaccine's effect typically lasts 6-12 months and must be given every year in good time before the flu season starts - typically in October. Once you have been ill, it is too late to get the vaccine.

Influenza Vaccination

The Health Department (Sundhedsstyrelse) recommends influenza vaccination if you are at a particular risk of becoming seriously ill from the flu.

Check if you should be vaccinated against influenza on beskytdigmodinfluenza.dk

Who should be vaccinated?

  • People older than 65 years
  • People with chronic diseases (Diabetes, COPD, asthma, etc.)
  • People with overweight and a BMI above 40
  • Women with a pregnancy of over 12 weeks
  • Retirees

Remember to book time between October 1 and December 31.

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