If you live together with someone with a severely weakened immune system you are also advised to get vaccinated (it varies across regions whether you are offered the flu vaccine for free or have to pay if you belong to this group), as are children who have certain serious health conditions and who are older than six months. If you do not belong to one of the above groups, your risk of getting seriously ill from the flu is seen as considerably lower and you can’t get the vaccine for free in Sweden. You can look it up by going to the page vaccination mot influensa (“vaccination against influenza”) on the 1177.se healthcare website, then at the top of the page click välj region (“choose region”) and pick your region.