A Covid certificate is needed for foreign nationals in order to travel to Sweden. The certificate shows that a person has been tested negative, has been vaccinated against, or recovered from Covid-19.
There is a ban on non-essential travel to Sweden from countries outside the EU/EEA until 31 January 2022. A number of countries are exempt from the entry ban. Foreign nationals travelling to Sweden from these countries must be exempted from the travel ban and show evidence of a negative test of Covid-19, from within the past 72 hours.
For more information about the Covid certificate, travel to Sweden and a list of the countries that are exempt from the entry ban, please visit Travel to and from Sweden | The Swedish Police Authority (polisen.se) and the page of the Swedish Government.