With this study we aim to utilize the COPSAC2010 cohort to make exploratory investigations on the association between PFOS and PFOA exposure in pregnancy and early childhood on atopic and non-atopic asthma phenotypes at age 6 defined by various comorbidities and biomarkers and prospectively collected data among COPSAC2010 participants, where underlying mechanisms are investigated by integrating data on systemic low-grade inflammation (hs-CRP), functional immune responses, and epigenetics. This evidence concerns the gene CRP and asthma.