Inclusion Criteria:  a microbiologically proven SARS-CoV2 infection More than 50 years of age; Ability to provide written informed consent.  Exclusion Criteria:  Contra-indication for PET: Pregnancy, Breast-feeding, Severe claustrophobia. Contra-indication for administration of iodine-containing contrast agents Other serious illness, e.g. history of malignancies or auto-immune disorders Known pre-existing lymphopenia from an unrelated other medical condition Estimated creatinine clearance ≤ 30 mL/min according to the Cockcroft-Gault formula (or local institutional standard method) OR oligo-uric patients (<400 mL/24hr)