Infection(2) SARSCoV-2(2) acute phase(2) extension(2) consequence(2) SARS-CoV-2(2) knowledge(2) Research(2) PET/CT(2) appearance(2) Spanish(2) caused(2) vaccination(2) Long COVID-19(2) Lung inflammation(2) damage(2) multifactorial(2) English(2) Inflammation(2) SARS-COV-2 infection(2) Complication(2) mass vaccination(2) effort(2) recent(2) COVID-19(2) Still(2) Pneumonia(2) humans(2) 18F-FDG-PET/CT(2) alteration(2)