The study asked over 75,000 people about the 23 symptoms most commonly associated with long COVID.
The study suggests that women, younger people; or belonging to a Black, mixed or other ethnic group are at greater risk of developing Long COVID.
The team analyzed data on 1,884 children with COVID-19 in eight countries.
The team looked at existing studies which analyzed the effects of the disease on more than 1.3 million people.
The condition affects between eight and 12 percent of jabbed people who catch the virus, the researchers say.
It is believed more than half of people who catch coronavirus could end up with some form of long COVID-19.