long Covid-19 infection with symptoms in an uninfected person as well as measuring symptoms in individuals both pre- and post-Covid-19 virus.
It laid emphasis on the symptoms most often associated with long Covid-19 and gives an estimate at how likely it occurs in the general population.
A total of 76,400 adults in the Netherlands were asked to fill out an online questionnaire on 23 common long Covid-19 symptoms.
Each participant filled out the questionnaire 24 times between March 2020-August 2021. During this, more than 4,200 people reported catching Covid-19.